class.phpmailer.php

<?php
/**
 * PHPMailer - PHP email creation and transport class.
 * PHP Version 5
 * @package PHPMailer
 * @link https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project
 * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
 * @author Jim Jagielski (jimjag) <jimjag@gmail.com>
 * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
 * @author Brent R. Matzelle (original founder)
 * @copyright 2012 - 2014 Marcus Bointon
 * @copyright 2010 - 2012 Jim Jagielski
 * @copyright 2004 - 2009 Andy Prevost
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 * @note This program is distributed in the hope that it will be useful - WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 */

/**
 * PHPMailer - PHP email creation and transport class.
 * @package PHPMailer
 * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk>
 * @author Jim Jagielski (jimjag) <jimjag@gmail.com>
 * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
 * @author Brent R. Matzelle (original founder)
 */
class PHPMailer
{
    /**
     * The PHPMailer Version number.
     * @type string
     */
    public $Version = 5.2.9;

    /**
     * Email priority.
     * Options: 1 = High, 3 = Normal, 5 = low.
     * @type integer
     */
    public $Priority = 3;

    /**
     * The character set of the message.
     * @type string
     */
    public $CharSet = iso-8859-1;

    /**
     * The MIME Content-type of the message.
     * @type string
     */
    public $ContentType = text/plain;

    /**
     * The message encoding.
     * Options: "8bit", "7bit", "binary", "base64", and "quoted-printable".
     * @type string
     */
    public $Encoding = 8bit;

    /**
     * Holds the most recent mailer error message.
     * @type string
     */
    public $ErrorInfo = ;

    /**
     * The From email address for the message.
     * @type string
     */
    public $From = root@localhost;

    /**
     * The From name of the message.
     * @type string
     */
    public $FromName = Root User;

    /**
     * The Sender email (Return-Path) of the message.
     * If not empty, will be sent via -f to sendmail or as MAIL FROM in smtp mode.
     * @type string
     */
    public $Sender = ;

    /**
     * The Return-Path of the message.
     * If empty, it will be set to either From or Sender.
     * @type string
     * @deprecated Email senders should never set a return-path header;
     * its the receivers job (RFC5321 section 4.4), so this no longer does anything.
     * @link https://tools.ietf.org/html/rfc5321#section-4.4 RFC5321 reference
     */
    public $ReturnPath = ;

    /**
     * The Subject of the message.
     * @type string
     */
    public $Subject = ;

    /**
     * An HTML or plain text message body.
     * If HTML then call isHTML(true).
     * @type string
     */
    public $Body = ;

    /**
     * The plain-text message body.
     * This body can be read by mail clients that do not have HTML email
     * capability such as mutt & Eudora.
     * Clients that can read HTML will view the normal Body.
     * @type string
     */
    public $AltBody = ;

    /**
     * An iCal message part body.
     * Only supported in simple alt or alt_inline message types
     * To generate iCal events, use the bundled extras/EasyPeasyICS.php class or iCalcreator
     * @link http://sprain.ch/blog/downloads/php-class-easypeasyics-create-ical-files-with-php/
     * @link http://kigkonsult.se/iCalcreator/
     * @type string
     */
    public $Ical = ;

    /**
     * The complete compiled MIME message body.
     * @access protected
     * @type string
     */
    protected $MIMEBody = ;

    /**
     * The complete compiled MIME message headers.
     * @type string
     * @access protected
     */
    protected $MIMEHeader = ;

    /**
     * Extra headers that createHeader() doesnt fold in.
     * @type string
     * @access protected
     */
    protected $mailHeader = ;

    /**
     * Word-wrap the message body to this number of chars.
     * Set to 0 to not wrap. A useful value here is 78, for RFC2822 section 2.1.1 compliance.
     * @type integer
     */
    public $WordWrap = 0;

    /**
     * Which method to use to send mail.
     * Options: "mail", "sendmail", or "smtp".
     * @type string
     */
    public $Mailer = mail;

    /**
     * The path to the sendmail program.
     * @type string
     */
    public $Sendmail = /usr/sbin/sendmail;

    /**
     * Whether mail() uses a fully sendmail-compatible MTA.
     * One which supports sendmails "-oi -f" options.
     * @type boolean
     */
    public $UseSendmailOptions = true;

    /**
     * Path to PHPMailer plugins.
     * Useful if the SMTP class is not in the PHP include path.
     * @type string
     * @deprecated Should not be needed now there is an autoloader.
     */
    public $PluginDir = ;

    /**
     * The email address that a reading confirmation should be sent to.
     * @type string
     */
    public $ConfirmReadingTo = ;

    /**
     * The hostname to use in Message-Id and Received headers
     * and as default HELO string.
     * If empty, the value returned
     * by SERVER_NAME is used or localhost.localdomain.
     * @type string
     */
    public $Hostname = ;

    /**
     * An ID to be used in the Message-Id header.
     * If empty, a unique id will be generated.
     * @type string
     */
    public $MessageID = ;

    /**
     * The message Date to be used in the Date header.
     * If empty, the current date will be added.
     * @type string
     */
    public $MessageDate = ;

    /**
     * SMTP hosts.
     * Either a single hostname or multiple semicolon-delimited hostnames.
     * You can also specify a different port
     * for each host by using this format: [hostname:port]
     * (e.g. "smtp1.example.com:25;smtp2.example.com").
     * You can also specify encryption type, for example:
     * (e.g. "tls://smtp1.example.com:587;ssl://smtp2.example.com:465").
     * Hosts will be tried in order.
     * @type string
     */
    public $Host = localhost;

    /**
     * The default SMTP server port.
     * @type integer
     * @TODO Why is this needed when the SMTP class takes care of it?
     */
    public $Port = 25;

    /**
     * The SMTP HELO of the message.
     * Default is $Hostname.
     * @type string
     * @see PHPMailer::$Hostname
     */
    public $Helo = ;

    /**
     * The secure connection prefix.
     * Options: "", "ssl" or "tls"
     * @type string
     */
    public $SMTPSecure = ;

    /**
     * Whether to use SMTP authentication.
     * Uses the Username and Password properties.
     * @type boolean
     * @see PHPMailer::$Username
     * @see PHPMailer::$Password
     */
    public $SMTPAuth = false;

    /**
     * SMTP username.
     * @type string
     */
    public $Username = ;

    /**
     * SMTP password.
     * @type string
     */
    public $Password = ;

    /**
     * SMTP auth type.
     * Options are LOGIN (default), PLAIN, NTLM, CRAM-MD5
     * @type string
     */
    public $AuthType = ;

    /**
     * SMTP realm.
     * Used for NTLM auth
     * @type string
     */
    public $Realm = ;

    /**
     * SMTP workstation.
     * Used for NTLM auth
     * @type string
     */
    public $Workstation = ;

    /**
     * The SMTP server timeout in seconds.
     * Default of 5 minutes (300sec) is from RFC2821 section 4.5.3.2
     * @type integer
     */
    public $Timeout = 300;

    /**
     * SMTP class debug output mode.
     * Debug output level.
     * Options:
     * * `0` No output
     * * `1` Commands
     * * `2` Data and commands
     * * `3` As 2 plus connection status
     * * `4` Low-level data output
     * @type integer
     * @see SMTP::$do_debug
     */
    public $SMTPDebug = 0;

    /**
     * How to handle debug output.
     * Options:
     * * `echo` Output plain-text as-is, appropriate for CLI
     * * `html` Output escaped, line breaks converted to `<br>`, appropriate for browser output
     * * `error_log` Output to error log as configured in php.ini
     *
     * Alternatively, you can provide a callable expecting two params: a message string and the debug level:
     * <code>
     * $mail->Debugoutput = function($str, $level) {echo "debug level $level; message: $str";};
     * </code>
     * @type string|callable
     * @see SMTP::$Debugoutput
     */
    public $Debugoutput = echo;

    /**
     * Whether to keep SMTP connection open after each message.
     * If this is set to true then to close the connection
     * requires an explicit call to smtpClose().
     * @type boolean
     */
    public $SMTPKeepAlive = false;

    /**
     * Whether to split multiple to addresses into multiple messages
     * or send them all in one message.
     * @type boolean
     */
    public $SingleTo = false;

    /**
     * Storage for addresses when SingleTo is enabled.
     * @type array
     * @TODO This should really not be public
     */
    public $SingleToArray = array();

    /**
     * Whether to generate VERP addresses on send.
     * Only applicable when sending via SMTP.
     * @link http://en.wikipedia.org/wiki/Variable_envelope_return_path
     * @link http://www.postfix.org/VERP_README.html Postfix VERP info
     * @type boolean
     */
    public $do_verp = false;

    /**
     * Whether to allow sending messages with an empty body.
     * @type boolean
     */
    public $AllowEmpty = false;

    /**
     * The default line ending.
     * @note The default remains "\n". We force CRLF where we know
     *        it must be used via self::CRLF.
     * @type string
     */
    public $LE = "\n";

    /**
     * DKIM selector.
     * @type string
     */
    public $DKIM_selector = ;

    /**
     * DKIM Identity.
     * Usually the email address used as the source of the email
     * @type string
     */
    public $DKIM_identity = ;

    /**
     * DKIM passphrase.
     * Used if your key is encrypted.
     * @type string
     */
    public $DKIM_passphrase = ;

    /**
     * DKIM signing domain name.
     * @example example.com
     * @type string
     */
    public $DKIM_domain = ;

    /**
     * DKIM private key file path.
     * @type string
     */
    public $DKIM_private = ;

    /**
     * Callback Action function name.
     *
     * The function that handles the result of the send email action.
     * It is called out by send() for each email sent.
     *
     * Value can be any php callable: http://www.php.net/is_callable
     *
     * Parameters:
     *   boolean $result        result of the send action
     *   string  $to            email address of the recipient
     *   string  $cc            cc email addresses
     *   string  $bcc           bcc email addresses
     *   string  $subject       the subject
     *   string  $body          the email body
     *   string  $from          email address of sender
     * @type string
     */
    public $action_function = ;

    /**
     * What to put in the X-Mailer header.
     * Options: An empty string for PHPMailer default, whitespace for none, or a string to use
     * @type string
     */
    public $XMailer = ;

    /**
     * An instance of the SMTP sender class.
     * @type SMTP
     * @access protected
     */
    protected $smtp = null;

    /**
     * The array of to addresses.
     * @type array
     * @access protected
     */
    protected $to = array();

    /**
     * The array of cc addresses.
     * @type array
     * @access protected
     */
    protected $cc = array();

    /**
     * The array of bcc addresses.
     * @type array
     * @access protected
     */
    protected $bcc = array();

    /**
     * The array of reply-to names and addresses.
     * @type array
     * @access protected
     */
    protected $ReplyTo = array();

    /**
     * An array of all kinds of addresses.
     * Includes all of $to, $cc, $bcc, $replyto
     * @type array
     * @access protected
     */
    protected $all_recipients = array();

    /**
     * The array of attachments.
     * @type array
     * @access protected
     */
    protected $attachment = array();

    /**
     * The array of custom headers.
     * @type array
     * @access protected
     */
    protected $CustomHeader = array();

    /**
     * The most recent Message-ID (including angular brackets).
     * @type string
     * @access protected
     */
    protected $lastMessageID = ;

    /**
     * The messages MIME type.
     * @type string
     * @access protected
     */
    protected $message_type = ;

    /**
     * The array of MIME boundary strings.
     * @type array
     * @access protected
     */
    protected $boundary = array();

    /**
     * The array of available languages.
     * @type array
     * @access protected
     */
    protected $language = array();

    /**
     * The number of errors encountered.
     * @type integer
     * @access protected
     */
    protected $error_count = 0;

    /**
     * The S/MIME certificate file path.
     * @type string
     * @access protected
     */
    protected $sign_cert_file = ;

    /**
     * The S/MIME key file path.
     * @type string
     * @access protected
     */
    protected $sign_key_file = ;

    /**
     * The S/MIME password for the key.
     * Used only if the key is encrypted.
     * @type string
     * @access protected
     */
    protected $sign_key_pass = ;

    /**
     * Whether to throw exceptions for errors.
     * @type boolean
     * @access protected
     */
    protected $exceptions = false;

    /**
     * Error severity: message only, continue processing.
     */
    const STOP_MESSAGE = 0;

    /**
     * Error severity: message, likely ok to continue processing.
     */
    const STOP_CONTINUE = 1;

    /**
     * Error severity: message, plus full stop, critical error reached.
     */
    const STOP_CRITICAL = 2;

    /**
     * SMTP RFC standard line ending.
     */
    const CRLF = "\r\n";

    /**
     * Constructor.
     * @param boolean $exceptions Should we throw external exceptions?
     */
    public function __construct($exceptions = false)
    {
        $this->exceptions = (boolean)$exceptions;
    }

    /**
     * Destructor.
     */
    public function __destruct()
    {
        if ($this->Mailer == smtp) { //close any open SMTP connection nicely
            $this->smtpClose();
        }
    }

    /**
     * Call mail() in a safe_mode-aware fashion.
     * Also, unless sendmail_path points to sendmail (or something that
     * claims to be sendmail), dont pass params (not a perfect fix,
     * but it will do)
     * @param string $to To
     * @param string $subject Subject
     * @param string $body Message Body
     * @param string $header Additional Header(s)
     * @param string $params Params
     * @access private
     * @return boolean
     */
    private function mailPassthru($to, $subject, $body, $header, $params)
    {
        //Check overloading of mail function to avoid double-encoding
        if (ini_get(mbstring.func_overload) & 1) {
            $subject = $this->secureHeader($subject);
        } else {
            $subject = $this->encodeHeader($this->secureHeader($subject));
        }
        if (ini_get(safe_mode) || !($this->UseSendmailOptions)) {
            $result = @mail($to, $subject, $body, $header);
        } else {
            $result = @mail($to, $subject, $body, $header, $params);
        }
        return $result;
    }

    /**
     * Output debugging info via user-defined method.
     * Only generates output if SMTP debug output is enabled (@see SMTP::$do_debug).
     * @see PHPMailer::$Debugoutput
     * @see PHPMailer::$SMTPDebug
     * @param string $str
     */
    protected function edebug($str)
    {
        if ($this->SMTPDebug <= 0) {
            return;
        }
        //Avoid clash with built-in function names
        if (!in_array($this->Debugoutput, array(error_log, html, echo)) and is_callable($this->Debugoutput)) {
            call_user_func($this->Debugoutput, $str, $this->SMTPDebug);
            return;
        }
        switch ($this->Debugoutput) {
            case error_log:
                //Dont output, just log
                error_log($str);
                break;
            case html:
                //Cleans up output a bit for a better looking, HTML-safe output
                echo htmlentities(
                    preg_replace(/[\r\n]+/, , $str),
                    ENT_QUOTES,
                    UTF-8
                )
                . "<br>\n";
                break;
            case echo:
            default:
                //Normalize line breaks
                $str = preg_replace(/(\r\n|\r|\n)/ms, "\n", $str);
                echo gmdate(Y-m-d H:i:s) . "\t" . str_replace(
                    "\n",
                    "\n                   \t                  ",
                    trim($str)
                ) . "\n";
        }
    }

    /**
     * Sets message type to HTML or plain.
     * @param boolean $isHtml True for HTML mode.
     * @return void
     */
    public function isHTML($isHtml = true)
    {
        if ($isHtml) {
            $this->ContentType = text/html;
        } else {
            $this->ContentType = text/plain;
        }
    }

    /**
     * Send messages using SMTP.
     * @return void
     */
    public function isSMTP()
    {
        $this->Mailer = smtp;
    }

    /**
     * Send messages using PHPs mail() function.
     * @return void
     */
    public function isMail()
    {
        $this->Mailer = mail;
    }

    /**
     * Send messages using $Sendmail.
     * @return void
     */
    public function isSendmail()
    {
        $ini_sendmail_path = ini_get(sendmail_path);

        if (!stristr($ini_sendmail_path, sendmail)) {
            $this->Sendmail = /usr/sbin/sendmail;
        } else {
            $this->Sendmail = $ini_sendmail_path;
        }
        $this->Mailer = sendmail;
    }

    /**
     * Send messages using qmail.
     * @return void
     */
    public function isQmail()
    {
        $ini_sendmail_path = ini_get(sendmail_path);

        if (!stristr($ini_sendmail_path, qmail)) {
            $this->Sendmail = /var/qmail/bin/qmail-inject;
        } else {
            $this->Sendmail = $ini_sendmail_path;
        }
        $this->Mailer = qmail;
    }

    /**
     * Add a "To" address.
     * @param string $address
     * @param string $name
     * @return boolean true on success, false if address already used
     */
    public function addAddress($address, $name = )
    {
        return $this->addAnAddress(to, $address, $name);
    }

    /**
     * Add a "CC" address.
     * @note: This function works with the SMTP mailer on win32, not with the "mail" mailer.
     * @param string $address
     * @param string $name
     * @return boolean true on success, false if address already used
     */
    public function addCC($address, $name = )
    {
        return $this->addAnAddress(cc, $address, $name);
    }

    /**
     * Add a "BCC" address.
     * @note: This function works with the SMTP mailer on win32, not with the "mail" mailer.
     * @param string $address
     * @param string $name
     * @return boolean true on success, false if address already used
     */
    public function addBCC($address, $name = )
    {
        return $this->addAnAddress(bcc, $address, $name);
    }

    /**
     * Add a "Reply-to" address.
     * @param string $address
     * @param string $name
     * @return boolean
     */
    public function addReplyTo($address, $name = )
    {
        return $this->addAnAddress(Reply-To, $address, $name);
    }

    /**
     * Add an address to one of the recipient arrays.
     * Addresses that have been added already return false, but do not throw exceptions
     * @param string $kind One of to, cc, bcc, ReplyTo
     * @param string $address The email address to send to
     * @param string $name
     * @throws phpmailerException
     * @return boolean true on success, false if address already used or invalid in some way
     * @access protected
     */
    protected function addAnAddress($kind, $address, $name = )
    {
        if (!preg_match(/^(to|cc|bcc|Reply-To)$/, $kind)) {
            $this->setError($this->lang(Invalid recipient array) . :  . $kind);
            $this->edebug($this->lang(Invalid recipient array) . :  . $kind);
            if ($this->exceptions) {
                throw new phpmailerException(Invalid recipient array:  . $kind);
            }
            return false;
        }
        $address = trim($address);
        $name = trim(preg_replace(/[\r\n]+/, , $name)); //Strip breaks and trim
        if (!$this->validateAddress($address)) {
            $this->setError($this->lang(invalid_address) . :  . $address);
            $this->edebug($this->lang(invalid_address) . :  . $address);
            if ($this->exceptions) {
                throw new phpmailerException($this->lang(invalid_address) . :  . $address);
            }
            return false;
        }
        if ($kind != Reply-To) {
            if (!isset($this->all_recipients[strtolower($address)])) {
                array_push($this->$kind, array($address, $name));
                $this->all_recipients[strtolower($address)] = true;
                return true;
            }
        } else {
            if (!array_key_exists(strtolower($address), $this->ReplyTo)) {
                $this->ReplyTo[strtolower($address)] = array($address, $name);
                return true;
            }
        }
        return false;
    }

    /**
     * Set the From and FromName properties.
     * @param string $address
     * @param string $name
     * @param boolean $auto Whether to also set the Sender address, defaults to true
     * @throws phpmailerException
     * @return boolean
     */
    public function setFrom($address, $name = , $auto = true)
    {
        $address = trim($address);
        $name = trim(preg_replace(/[\r\n]+/, , $name)); //Strip breaks and trim
        if (!$this->validateAddress($address)) {
            $this->setError($this->lang(invalid_address) . :  . $address);
            $this->edebug($this->lang(invalid_address) . :  . $address);
            if ($this->exceptions) {
                throw new phpmailerException($this->lang(invalid_address) . :  . $address);
            }
            return false;
        }
        $this->From = $address;
        $this->FromName = $name;
        if ($auto) {
            if (empty($this->Sender)) {
                $this->Sender = $address;
            }
        }
        return true;
    }

    /**
     * Return the Message-ID header of the last email.
     * Technically this is the value from the last time the headers were created,
     * but its also the message ID of the last sent message except in
     * pathological cases.
     * @return string
     */
    public function getLastMessageID()
    {
        return $this->lastMessageID;
    }

    /**
     * Check that a string looks like an email address.
     * @param string $address The email address to check
     * @param string $patternselect A selector for the validation pattern to use :
     * * `auto` Pick strictest one automatically;
     * * `pcre8` Use the squiloople.com pattern, requires PCRE > 8.0, PHP >= 5.3.2, 5.2.14;
     * * `pcre` Use old PCRE implementation;
     * * `php` Use PHP built-in FILTER_VALIDATE_EMAIL; same as pcre8 but does not allow dotless domains;
     * * `html5` Use the pattern given by the HTML5 spec for email type form input elements.
     * * `noregex` Dont use a regex: super fast, really dumb.
     * @return boolean
     * @static
     * @access public
     */
    public static function validateAddress($address, $patternselect = auto)
    {
        if (!$patternselect or $patternselect == auto) {
            //Check this constant first so it works when extension_loaded() is disabled by safe mode
            //Constant was added in PHP 5.2.4
            if (defined(PCRE_VERSION)) {
                //This pattern can get stuck in a recursive loop in PCRE <= 8.0.2
                if (version_compare(PCRE_VERSION, 8.0.3) >= 0) {
                    $patternselect = pcre8;
                } else {
                    $patternselect = pcre;
                }
            } elseif (function_exists(extension_loaded) and extension_loaded(pcre)) {
                //Fall back to older PCRE
                $patternselect = pcre;
            } else {
                //Filter_var appeared in PHP 5.2.0 and does not require the PCRE extension
                if (version_compare(PHP_VERSION, 5.2.0) >= 0) {
                    $patternselect = php;
                } else {
                    $patternselect = noregex;
                }
            }
        }
        switch ($patternselect) {
            case pcre8:
                /**
                 * Uses the same RFC5322 regex on which FILTER_VALIDATE_EMAIL is based, but allows dotless domains.
                 * @link http://squiloople.com/2009/12/20/email-address-validation/
                 * @copyright 2009-2010 Michael Rushton
                 * Feel free to use and redistribute this code. But please keep this copyright notice.
                 */
                return (boolean)preg_match(
                    /^(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){255,})(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){65,}@) .
                    ((?>(?>(?>((?>(?>(?>\x0D\x0A)?[\t ])+|(?>[\t ]*\x0D\x0A)?[\t ]+)?)(\((?>(?2) .
                    (?>[\x01-\x08\x0B\x0C\x0E-\*-\[\]-\x7F]|\\\[\x00-\x7F]|(?3)))*(?2)\)))+(?2))|(?2))?) .
                    ([!#-\*+\/-9=?^-~-]+|"(?>(?2)(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\x7F]))* .
                    (?2)")(?>(?1)\.(?1)(?4))*(?1)@(?!(?1)[a-z0-9-]{64,})(?1)(?>([a-z0-9](?>[a-z0-9-]*[a-z0-9])?) .
                    (?>(?1)\.(?!(?1)[a-z0-9-]{64,})(?1)(?5)){0,126}|\[(?:(?>IPv6:(?>([a-f0-9]{1,4})(?>:(?6)){7} .
                    |(?!(?:.*[a-f0-9][:\]]){8,})((?6)(?>:(?6)){0,6})?::(?7)?))|(?>(?>IPv6:(?>(?6)(?>:(?6)){5}: .
                    |(?!(?:.*[a-f0-9]:){6,})(?8)?::(?>((?6)(?>:(?6)){0,4}):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2} .
                    |[1-9]?[0-9])(?>\.(?9)){3}))\])(?1)$/isD,
                    $address
                );
            case pcre:
                //An older regex that doesnt need a recent PCRE
                return (boolean)preg_match(
                    /^(?!(?>"?(?>\\\[ -~]|[^"])"?){255,})(?!(?>"?(?>\\\[ -~]|[^"])"?){65,}@)(?> .
                    [!#-\*+\/-9=?^-~-]+|"(?>(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\xFF]))*") .
                    (?>\.(?>[!#-\*+\/-9=?^-~-]+|"(?>(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\xFF]))*"))* .
                    @(?>(?![a-z0-9-]{64,})(?>[a-z0-9](?>[a-z0-9-]*[a-z0-9])?)(?>\.(?![a-z0-9-]{64,}) .
                    (?>[a-z0-9](?>[a-z0-9-]*[a-z0-9])?)){0,126}|\[(?:(?>IPv6:(?>(?>[a-f0-9]{1,4})(?>: .
                    [a-f0-9]{1,4}){7}|(?!(?:.*[a-f0-9][:\]]){8,})(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,6})? .
                    ::(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,6})?))|(?>(?>IPv6:(?>[a-f0-9]{1,4}(?>: .
                    [a-f0-9]{1,4}){5}:|(?!(?:.*[a-f0-9]:){6,})(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,4})? .
                    ::(?>(?:[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,4}):)?))?(?>25[0-5]|2[0-4][0-9]|1[0-9]{2} .
                    |[1-9]?[0-9])(?>\.(?>25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}))\])$/isD,
                    $address
                );
            case html5:
                /**
                 * This is the pattern used in the HTML5 spec for validation of email type form input elements.
                 * @link http://www.whatwg.org/specs/web-apps/current-work/#e-mail-state-(type=email)
                 */
                return (boolean)preg_match(
                    /^[a-zA-Z0-9.!#$%&\*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61} .
                    [a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/sD,
                    $address
                );
            case noregex:
                //No PCRE! Do something _very_ approximate!
                //Check the address is 3 chars or longer and contains an @ thats not the first or last char
                return (strlen($address) >= 3
                    and strpos($address, @) >= 1
                    and strpos($address, @) != strlen($address) - 1);
            case php:
            default:
                return (boolean)filter_var($address, FILTER_VALIDATE_EMAIL);
        }
    }

    /**
     * Create a message and send it.
     * Uses the sending method specified by $Mailer.
     * @throws phpmailerException
     * @return boolean false on error - See the ErrorInfo property for details of the error.
     */
    public function send()
    {
        try {
            if (!$this->preSend()) {
                return false;
            }
            return $this->postSend();
        } catch (phpmailerException $exc) {
            $this->mailHeader = ;
            $this->setError($exc->getMessage());
            if ($this->exceptions) {
                throw $exc;
            }
            return false;
        }
    }

    /**
     * Prepare a message for sending.
     * @throws phpmailerException
     * @return boolean
     */
    public function preSend()
    {
        try {
            $this->mailHeader = ;
            if ((count($this->to) + count($this->cc) + count($this->bcc)) < 1) {
                throw new phpmailerException($this->lang(provide_address), self::STOP_CRITICAL);
            }

            // Set whether the message is multipart/alternative
            if (!empty($this->AltBody)) {
                $this->ContentType = multipart/alternative;
            }

            $this->error_count = 0; // reset errors
            $this->setMessageType();
            // Refuse to send an empty message unless we are specifically allowing it
            if (!$this->AllowEmpty and empty($this->Body)) {
                throw new phpmailerException($this->lang(empty_message), self::STOP_CRITICAL);
            }

            $this->MIMEHeader = $this->createHeader();
            $this->MIMEBody = $this->createBody();

            // To capture the complete message when using mail(), create
            // an extra header list which createHeader() doesnt fold in
            if ($this->Mailer == mail) {
                if (count($this->to) > 0) {
                    $this->mailHeader .= $this->addrAppend(To, $this->to);
                } else {
                    $this->mailHeader .= $this->headerLine(To, undisclosed-recipients:;);
                }
                $this->mailHeader .= $this->headerLine(
                    Subject,
                    $this->encodeHeader($this->secureHeader(trim($this->Subject)))
                );
            }

            // Sign with DKIM if enabled
            if (!empty($this->DKIM_domain)
                && !empty($this->DKIM_private)
                && !empty($this->DKIM_selector)
                && file_exists($this->DKIM_private)) {
                $header_dkim = $this->DKIM_Add(
                    $this->MIMEHeader . $this->mailHeader,
                    $this->encodeHeader($this->secureHeader($this->Subject)),
                    $this->MIMEBody
                );
                $this->MIMEHeader = rtrim($this->MIMEHeader, "\r\n ") . self::CRLF .
                    str_replace("\r\n", "\n", $header_dkim) . self::CRLF;
            }
            return true;

        } catch (phpmailerException $exc) {
            $this->setError($exc->getMessage());
            if ($this->exceptions) {
                throw $exc;
            }
            return false;
        }
    }

    /**
     * Actually send a message.
     * Send the email via the selected mechanism
     * @throws phpmailerException
     * @return boolean
     */
    public function postSend()
    {
        try {
            // Choose the mailer and send through it
            switch ($this->Mailer) {
                case sendmail:
                case qmail:
                    return $this->sendmailSend($this->MIMEHeader, $this->MIMEBody);
                case smtp:
                    return $this->smtpSend($this->MIMEHeader, $this->MIMEBody);
                case mail:
                    return $this->mailSend($this->MIMEHeader, $this->MIMEBody);
                default:
                    $sendMethod = $this->Mailer.Send;
                    if (method_exists($this, $sendMethod)) {
                        return $this->$sendMethod($this->MIMEHeader, $this->MIMEBody);
                    }

                    return $this->mailSend($this->MIMEHeader, $this->MIMEBody);
            }
        } catch (phpmailerException $exc) {
            $this->setError($exc->getMessage());
            $this->edebug($exc->getMessage());
            if ($this->exceptions) {
                throw $exc;
            }
        }
        return false;
    }

    /**
     * Send mail using the $Sendmail program.
     * @param string $header The message headers
     * @param string $body The message body
     * @see PHPMailer::$Sendmail
     * @throws phpmailerException
     * @access protected
     * @return boolean
     */
    protected function sendmailSend($header, $body)
    {
        if ($this->Sender != ) {
            if ($this->Mailer == qmail) {
                $sendmail = sprintf(%s -f%s, escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender));
            } else {
                $sendmail = sprintf(%s -oi -f%s -t, escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender));
            }
        } else {
            if ($this->Mailer == qmail) {
                $sendmail = sprintf(%s, escapeshellcmd($this->Sendmail));
            } else {
                $sendmail = sprintf(%s -oi -t, escapeshellcmd($this->Sendmail));
            }
        }
        if ($this->SingleTo) {
            foreach ($this->SingleToArray as $toAddr) {
                if (!@$mail = popen($sendmail, w)) {
                    throw new phpmailerException($this->lang(execute) . $this->Sendmail, self::STOP_CRITICAL);
                }
                fputs($mail, To:  . $toAddr . "\n");
                fputs($mail, $header);
                fputs($mail, $body);
                $result = pclose($mail);
                $this->doCallback(
                    ($result == 0),
                    array($toAddr),
                    $this->cc,
                    $this->bcc,
                    $this->Subject,
                    $body,
                    $this->From
                );
                if ($result != 0) {
                    throw new phpmailerException($this->lang(execute) . $this->Sendmail, self::STOP_CRITICAL);
                }
            }
        } else {
            if (!@$mail = popen($sendmail, w)) {
                throw new phpmailerException($this->lang(execute) . $this->Sendmail, self::STOP_CRITICAL);
            }
            fputs($mail, $header);
            fputs($mail, $body);
            $result = pclose($mail);
            $this->doCallback(($result == 0), $this->to, $this->cc, $this->bcc, $this->Subject, $body, $this->From);
            if ($result != 0) {
                throw new phpmailerException($this->lang(execute) . $this->Sendmail, self::STOP_CRITICAL);
            }
        }
        return true;
    }

    /**
     * Send mail using the PHP mail() function.
     * @param string $header The message headers
     * @param string $body The message body
     * @link http://www.php.net/manual/en/book.mail.php
     * @throws phpmailerException
     * @access protected
     * @return boolean
     */
    protected function mailSend($header, $body)
    {
        $toArr = array();
        foreach ($this->to as $toaddr) {
            $toArr[] = $this->addrFormat($toaddr);
        }
        $to = implode(, , $toArr);

        if (empty($this->Sender)) {
            $params =  ;
        } else {
            $params = sprintf(-f%s, $this->Sender);
        }
        if ($this->Sender !=  and !ini_get(safe_mode)) {
            $old_from = ini_get(sendmail_from);
            ini_set(sendmail_from, $this->Sender);
        }
        $result = false;
        if ($this->SingleTo && count($toArr) > 1) {
            foreach ($toArr as $toAddr) {
                $result = $this->mailPassthru($toAddr, $this->Subject, $body, $header, $params);
                $this->doCallback($result, array($toAddr), $this->cc, $this->bcc, $this->Subject, $body, $this->From);
            }
        } else {
            $result = $this->mailPassthru($to, $this->Subject, $body, $header, $params);
            $this->doCallback($result, $this->to, $this->cc, $this->bcc, $this->Subject, $body, $this->From);
        }
        if (isset($old_from)) {
            ini_set(sendmail_from, $old_from);
        }
        if (!$result) {
            throw new phpmailerException($this->lang(instantiate), self::STOP_CRITICAL);
        }
        return true;
    }

    /**
     * Get an instance to use for SMTP operations.
     * Override this function to load your own SMTP implementation
     * @return SMTP
     */
    public function getSMTPInstance()
    {
        if (!is_object($this->smtp)) {
            $this->smtp = new SMTP;
        }
        return $this->smtp;
    }

    /**
     * Send mail via SMTP.
     * Returns false if there is a bad MAIL FROM, RCPT, or DATA input.
     * Uses the PHPMailerSMTP class by default.
     * @see PHPMailer::getSMTPInstance() to use a different class.
     * @param string $header The message headers
     * @param string $body The message body
     * @throws phpmailerException
     * @uses SMTP
     * @access protected
     * @return boolean
     */
    protected function smtpSend($header, $body)
    {
        $bad_rcpt = array();

        if (!$this->smtpConnect()) {
            throw new phpmailerException($this->lang(smtp_connect_failed), self::STOP_CRITICAL);
        }
        $smtp_from = ($this->Sender == ) ? $this->From : $this->Sender;
        if (!$this->smtp->mail($smtp_from)) {
            $this->setError($this->lang(from_failed) . $smtp_from .  :  . implode(,, $this->smtp->getError()));
            throw new phpmailerException($this->ErrorInfo, self::STOP_CRITICAL);
        }

        // Attempt to send to all recipients
        foreach ($this->to as $to) {
            if (!$this->smtp->recipient($to[0])) {
                $bad_rcpt[] = $to[0];
                $isSent = false;
            } else {
                $isSent = true;
            }
            $this->doCallback($isSent, array($to[0]), array(), array(), $this->Subject, $body, $this->From);
        }
        foreach ($this->cc as $cc) {
            if (!$this->smtp->recipient($cc[0])) {
                $bad_rcpt[] = $cc[0];
                $isSent = false;
            } else {
                $isSent = true;
            }
            $this->doCallback($isSent, array(), array($cc[0]), array(), $this->Subject, $body, $this->From);
        }
        foreach ($this->bcc as $bcc) {
            if (!$this->smtp->recipient($bcc[0])) {
                $bad_rcpt[] = $bcc[0];
                $isSent = false;
            } else {
                $isSent = true;
            }
            $this->doCallback($isSent, array(), array(), array($bcc[0]), $this->Subject, $body, $this->From);
        }

        // Only send the DATA command if we have viable recipients
        if ((count($this->all_recipients) > count($bad_rcpt)) and !$this->smtp->data($header . $body)) {
            throw new phpmailerException($this->lang(data_not_accepted), self::STOP_CRITICAL);
        }
        if ($this->SMTPKeepAlive) {
            $this->smtp->reset();
        } else {
            $this->smtp->quit();
            $this->smtp->close();
        }
        if (count($bad_rcpt) > 0) { // Create error message for any bad addresses
            throw new phpmailerException(
                $this->lang(recipients_failed) . implode(, , $bad_rcpt),
                self::STOP_CONTINUE
            );
        }
        return true;
    }

    /**
     * Initiate a connection to an SMTP server.
     * Returns false if the operation failed.
     * @param array $options An array of options compatible with stream_context_create()
     * @uses SMTP
     * @access public
     * @throws phpmailerException
     * @return boolean
     */
    public function smtpConnect($options = array())
    {
        if (is_null($this->smtp)) {
            $this->smtp = $this->getSMTPInstance();
        }

        // Already connected?
        if ($this->smtp->connected()) {
            return true;
        }

        $this->smtp->setTimeout($this->Timeout);
        $this->smtp->setDebugLevel($this->SMTPDebug);
        $this->smtp->setDebugOutput($this->Debugoutput);
        $this->smtp->setVerp($this->do_verp);
        $hosts = explode(;, $this->Host);
        $lastexception = null;

        foreach ($hosts as $hostentry) {
            $hostinfo = array();
            if (!preg_match(/^((ssl|tls):\/\/)*([a-zA-Z0-9\.-]*):?([0-9]*)$/, trim($hostentry), $hostinfo)) {
                // Not a valid host entry
                continue;
            }
            // $hostinfo[2]: optional ssl or tls prefix
            // $hostinfo[3]: the hostname
            // $hostinfo[4]: optional port number
            // The host string prefix can temporarily override the current setting for SMTPSecure
            // If its not specified, the default value is used
            $prefix = ;
            $tls = ($this->SMTPSecure == tls);
            if ($hostinfo[2] == ssl or ($hostinfo[2] ==  and $this->SMTPSecure == ssl)) {
                $prefix = ssl://;
                $tls = false; // Cant have SSL and TLS at once
            } elseif ($hostinfo[2] == tls) {
                $tls = true;
                // tls doesnt use a prefix
            }
            $host = $hostinfo[3];
            $port = $this->Port;
            $tport = (integer)$hostinfo[4];
            if ($tport > 0 and $tport < 65536) {
                $port = $tport;
            }
            if ($this->smtp->connect($prefix . $host, $port, $this->Timeout, $options)) {
                try {
                    if ($this->Helo) {
                        $hello = $this->Helo;
                    } else {
                        $hello = $this->serverHostname();
                    }
                    $this->smtp->hello($hello);

                    if ($tls) {
                        if (!$this->smtp->startTLS()) {
                            throw new phpmailerException($this->lang(connect_host));
                        }
                        // We must resend HELO after tls negotiation
                        $this->smtp->hello($hello);
                    }
                    if ($this->SMTPAuth) {
                        if (!$this->smtp->authenticate(
                            $this->Username,
                            $this->Password,
                            $this->AuthType,
                            $this->Realm,
                            $this->Workstation
                        )
                        ) {
                            throw new phpmailerException($this->lang(authenticate));
                        }
                    }
                    return true;
                } catch (phpmailerException $exc) {
                    $lastexception = $exc;
                    // We must have connected, but then failed TLS or Auth, so close connection nicely
                    $this->smtp->quit();
                }
            }
        }
        // If we get here, all connection attempts have failed, so close connection hard
        $this->smtp->close();
        // As weve caught all exceptions, just report whatever the last one was
        if ($this->exceptions and !is_null($lastexception)) {
            throw $lastexception;
        }
        return false;
    }

    /**
     * Close the active SMTP session if one exists.
     * @return void
     */
    public function smtpClose()
    {
        if ($this->smtp !== null) {
            if ($this->smtp->connected()) {
                $this->smtp->quit();
                $this->smtp->close();
            }
        }
    }

    /**
     * Set the language for error messages.
     * Returns false if it cannot load the language file.
     * The default language is English.
     * @param string $langcode ISO 639-1 2-character language code (e.g. French is "fr")
     * @param string $lang_path Path to the language file directory, with trailing separator (slash)
     * @return boolean
     * @access public
     */
    public function setLanguage($langcode = en, $lang_path = )
    {
        // Define full set of translatable strings in English
        $PHPMAILER_LANG = array(
            authenticate => SMTP Error: Could not authenticate.,
            connect_host => SMTP Error: Could not connect to SMTP host.,
            data_not_accepted => SMTP Error: data not accepted.,
            empty_message => Message body empty,
            encoding => Unknown encoding: ,
            execute => Could not execute: ,
            file_access => Could not access file: ,
            file_open => File Error: Could not open file: ,
            from_failed => The following From address failed: ,
            instantiate => Could not instantiate mail function.,
            invalid_address => Invalid address,
            mailer_not_supported =>  mailer is not supported.,
            provide_address => You must provide at least one recipient email address.,
            recipients_failed => SMTP Error: The following recipients failed: ,
            signing => Signing Error: ,
            smtp_connect_failed => SMTP connect() failed.,
            smtp_error => SMTP server error: ,
            variable_set => Cannot set or reset variable: 
        );
        if (empty($lang_path)) {
            // Calculate an absolute path so it can work if CWD is not here
            $lang_path = dirname(__FILE__). DIRECTORY_SEPARATOR . language. DIRECTORY_SEPARATOR;
        }
        $foundlang = true;
        $lang_file = $lang_path . phpmailer.lang- . $langcode . .php;
        if ($langcode != en) { // There is no English translation file
            // Make sure language file path is readable
            if (!is_readable($lang_file)) {
                $foundlang = false;
            } else {
                // Overwrite language-specific strings.
                // This way well never have missing translations.
                $foundlang = include $lang_file;
            }
        }
        $this->language = $PHPMAILER_LANG;
        return (boolean)$foundlang; // Returns false if language not found
    }

    /**
     * Get the array of strings for the current language.
     * @return array
     */
    public function getTranslations()
    {
        return $this->language;
    }

    /**
     * Create recipient headers.
     * @access public
     * @param string $type
     * @param array $addr An array of recipient,
     * where each recipient is a 2-element indexed array with element 0 containing an address
     * and element 1 containing a name, like:
     * array(array(joe@example.com, Joe User), array(zoe@example.com, Zoe User))
     * @return string
     */
    public function addrAppend($type, $addr)
    {
        $addresses = array();
        foreach ($addr as $address) {
            $addresses[] = $this->addrFormat($address);
        }
        return $type . :  . implode(, , $addresses) . $this->LE;
    }

    /**
     * Format an address for use in a message header.
     * @access public
     * @param array $addr A 2-element indexed array, element 0 containing an address, element 1 containing a name
     *      like array(joe@example.com, Joe User)
     * @return string
     */
    public function addrFormat($addr)
    {
        if (empty($addr[1])) { // No name provided
            return $this->secureHeader($addr[0]);
        } else {
            return $this->encodeHeader($this->secureHeader($addr[1]), phrase) .  < . $this->secureHeader(
                $addr[0]
            ) . >;
        }
    }

    /**
     * Word-wrap message.
     * For use with mailers that do not automatically perform wrapping
     * and for quoted-printable encoded messages.
     * Original written by philippe.
     * @param string $message The message to wrap
     * @param integer $length The line length to wrap to
     * @param boolean $qp_mode Whether to run in Quoted-Printable mode
     * @access public
     * @return string
     */
    public function wrapText($message, $length, $qp_mode = false)
    {
        $soft_break = ($qp_mode) ? sprintf( =%s, $this->LE) : $this->LE;
        // If utf-8 encoding is used, we will need to make sure we dont
        // split multibyte characters when we wrap
        $is_utf8 = (strtolower($this->CharSet) == utf-8);
        $lelen = strlen($this->LE);
        $crlflen = strlen(self::CRLF);

        $message = $this->fixEOL($message);
        if (substr($message, -$lelen) == $this->LE) {
            $message = substr($message, 0, -$lelen);
        }

        $line = explode($this->LE, $message); // Magic. We know fixEOL uses $LE
        $message = ;
        for ($i = 0; $i < count($line); $i++) {
            $line_part = explode( , $line[$i]);
            $buf = ;
            for ($e = 0; $e < count($line_part); $e++) {
                $word = $line_part[$e];
                if ($qp_mode and (strlen($word) > $length)) {
                    $space_left = $length - strlen($buf) - $crlflen;
                    if ($e != 0) {
                        if ($space_left > 20) {
                            $len = $space_left;
                            if ($is_utf8) {
                                $len = $this->utf8CharBoundary($word, $len);
                            } elseif (substr($word, $len - 1, 1) == =) {
                                $len--;
                            } elseif (substr($word, $len - 2, 1) == =) {
                                $len -= 2;
                            }
                            $part = substr($word, 0, $len);
                            $word = substr($word, $len);
                            $buf .=   . $part;
                            $message .= $buf . sprintf(=%s, self::CRLF);
                        } else {
                            $message .= $buf . $soft_break;
                        }
                        $buf = ;
                    }
                    while (strlen($word) > 0) {
                        if ($length <= 0) {
                            break;
                        }
                        $len = $length;
                        if ($is_utf8) {
                            $len = $this->utf8CharBoundary($word, $len);
                        } elseif (substr($word, $len - 1, 1) == =) {
                            $len--;
                        } elseif (substr($word, $len - 2, 1) == =) {
                            $len -= 2;
                        }
                        $part = substr($word, 0, $len);
                        $word = substr($word, $len);

                        if (strlen($word) > 0) {
                            $message .= $part . sprintf(=%s, self::CRLF);
                        } else {
                            $buf = $part;
                        }
                    }
                } else {
                    $buf_o = $buf;
                    $buf .= ($e == 0) ? $word : (  . $word);

                    if (strlen($buf) > $length and $buf_o != ) {
                        $message .= $buf_o . $soft_break;
                        $buf = $word;
                    }
                }
            }
            $message .= $buf . self::CRLF;
        }

        return $message;
    }

    /**
     * Find the last character boundary prior to $maxLength in a utf-8
     * quoted (printable) encoded string.
     * Original written by Colin Brown.
     * @access public
     * @param string $encodedText utf-8 QP text
     * @param integer $maxLength   find last character boundary prior to this length
     * @return integer
     */
    public function utf8CharBoundary($encodedText, $maxLength)
    {
        $foundSplitPos = false;
        $lookBack = 3;
        while (!$foundSplitPos) {
            $lastChunk = substr($encodedText, $maxLength - $lookBack, $lookBack);
            $encodedCharPos = strpos($lastChunk, =);
            if (false !== $encodedCharPos) {
                // Found start of encoded character byte within $lookBack block.
                // Check the encoded byte value (the 2 chars after the =)
                $hex = substr($encodedText, $maxLength - $lookBack + $encodedCharPos + 1, 2);
                $dec = hexdec($hex);
                if ($dec < 128) { // Single byte character.
                    // If the encoded char was found at pos 0, it will fit
                    // otherwise reduce maxLength to start of the encoded char
                    $maxLength = ($encodedCharPos == 0) ? $maxLength :
                        $maxLength - ($lookBack - $encodedCharPos);
                    $foundSplitPos = true;
                } elseif ($dec >= 192) { // First byte of a multi byte character
                    // Reduce maxLength to split at start of character
                    $maxLength = $maxLength - ($lookBack - $encodedCharPos);
                    $foundSplitPos = true;
                } elseif ($dec < 192) { // Middle byte of a multi byte character, look further back
                    $lookBack += 3;
                }
            } else {
                // No encoded character found
                $foundSplitPos = true;
            }
        }
        return $maxLength;
    }

    /**
     * Set the body wrapping.
     * @access public
     * @return void
     */
    public function setWordWrap()
    {
        if ($this->WordWrap < 1) {
            return;
        }

        switch ($this->message_type) {
            case alt:
            case alt_inline:
            case alt_attach:
            case alt_inline_attach:
                $this->AltBody = $this->wrapText($this->AltBody, $this->WordWrap);
                break;
            default:
                $this->Body = $this->wrapText($this->Body, $this->WordWrap);
                break;
        }
    }

    /**
     * Assemble message headers.
     * @access public
     * @return string The assembled headers
     */
    public function createHeader()
    {
        $result = ;

        // Set the boundaries
        $uniq_id = md5(uniqid(time()));
        $this->boundary[1] = b1_ . $uniq_id;
        $this->boundary[2] = b2_ . $uniq_id;
        $this->boundary[3] = b3_ . $uniq_id;

        if ($this->MessageDate == ) {
            $this->MessageDate = self::rfcDate();
        }
        $result .= $this->headerLine(Date, $this->MessageDate);


        // To be created automatically by mail()
        if ($this->SingleTo) {
            if ($this->Mailer != mail) {
                foreach ($this->to as $toaddr) {
                    $this->SingleToArray[] = $this->addrFormat($toaddr);
                }
            }
        } else {
            if (count($this->to) > 0) {
                if ($this->Mailer != mail) {
                    $result .= $this->addrAppend(To, $this->to);
                }
            } elseif (count($this->cc) == 0) {
                $result .= $this->headerLine(To, undisclosed-recipients:;);
            }
        }

        $result .= $this->addrAppend(From, array(array(trim($this->From), $this->FromName)));

        // sendmail and mail() extract Cc from the header before sending
        if (count($this->cc) > 0) {
            $result .= $this->addrAppend(Cc, $this->cc);
        }

        // sendmail and mail() extract Bcc from the header before sending
        if ((
                $this->Mailer == sendmail or $this->Mailer == qmail or $this->Mailer == mail
            )
            and count($this->bcc) > 0
        ) {
            $result .= $this->addrAppend(Bcc, $this->bcc);
        }

        if (count($this->ReplyTo) > 0) {
            $result .= $this->addrAppend(Reply-To, $this->ReplyTo);
        }

        // mail() sets the subject itself
        if ($this->Mailer != mail) {
            $result .= $this->headerLine(Subject, $this->encodeHeader($this->secureHeader($this->Subject)));
        }

        if ($this->MessageID != ) {
            $this->lastMessageID = $this->MessageID;
        } else {
            $this->lastMessageID = sprintf(<%s@%s>, $uniq_id, $this->ServerHostname());
        }
        $result .= $this->HeaderLine(Message-ID, $this->lastMessageID);
        $result .= $this->headerLine(X-Priority, $this->Priority);
        if ($this->XMailer == ) {
            $result .= $this->headerLine(
                X-Mailer,
                PHPMailer  . $this->Version .  (https://github.com/PHPMailer/PHPMailer/)
            );
        } else {
            $myXmailer = trim($this->XMailer);
            if ($myXmailer) {
                $result .= $this->headerLine(X-Mailer, $myXmailer);
            }
        }

        if ($this->ConfirmReadingTo != ) {
            $result .= $this->headerLine(Disposition-Notification-To, < . trim($this->ConfirmReadingTo) . >);
        }

        // Add custom headers
        for ($index = 0; $index < count($this->CustomHeader); $index++) {
            $result .= $this->headerLine(
                trim($this->CustomHeader[$index][0]),
                $this->encodeHeader(trim($this->CustomHeader[$index][1]))
            );
        }
        if (!$this->sign_key_file) {
            $result .= $this->headerLine(MIME-Version, 1.0);
            $result .= $this->getMailMIME();
        }

        return $result;
    }

    /**
     * Get the message MIME type headers.
     * @access public
     * @return string
     */
    public function getMailMIME()
    {
        $result = ;
        $ismultipart = true;
        switch ($this->message_type) {
            case inline:
                $result .= $this->headerLine(Content-Type, multipart/related;);
                $result .= $this->textLine("\tboundary=\"" . $this->boundary[1] . ");
                break;
            case attach:
            case inline_attach:
            case alt_attach:
            case alt_inline_attach:
                $result .= $this->headerLine(Content-Type, multipart/mixed;);
                $result .= $this->textLine("\tboundary=\"" . $this->boundary[1] . ");
                break;
            case alt:
            case alt_inline:
                $result .= $this->headerLine(Content-Type, multipart/alternative;);
                $result .= $this->textLine("\tboundary=\"" . $this->boundary[1] . ");
                break;
            default:
                // Catches case plain: and case :
                $result .= $this->textLine(Content-Type:  . $this->ContentType . ; charset= . $this->CharSet);
                $ismultipart = false;
                break;
        }
        // RFC1341 part 5 says 7bit is assumed if not specified
        if ($this->Encoding != 7bit) {
            // RFC 2045 section 6.4 says multipart MIME parts may only use 7bit, 8bit or binary CTE
            if ($ismultipart) {
                if ($this->Encoding == 8bit) {
                    $result .= $this->headerLine(Content-Transfer-Encoding, 8bit);
                }
                // The only remaining alternatives are quoted-printable and base64, which are both 7bit compatible
            } else {
                $result .= $this->headerLine(Content-Transfer-Encoding, $this->Encoding);
            }
        }

        if ($this->Mailer != mail) {
            $result .= $this->LE;
        }

        return $result;
    }

    /**
     * Returns the whole MIME message.
     * Includes complete headers and body.
     * Only valid post preSend().
     * @see PHPMailer::preSend()
     * @access public
     * @return string
     */
    public function getSentMIMEMessage()
    {
        return $this->MIMEHeader . $this->mailHeader . self::CRLF . $this->MIMEBody;
    }


    /**
     * Assemble the message body.
     * Returns an empty string on failure.
     * @access public
     * @throws phpmailerException
     * @return string The assembled message body
     */
    public function createBody()
    {
        $body = ;

        if ($this->sign_key_file) {
            $body .= $this->getMailMIME() . $this->LE;
        }

        $this->setWordWrap();

        $bodyEncoding = $this->Encoding;
        $bodyCharSet = $this->CharSet;
        if ($bodyEncoding == 8bit and !$this->has8bitChars($this->Body)) {
            $bodyEncoding = 7bit;
            $bodyCharSet = us-ascii;
        }
        $altBodyEncoding = $this->Encoding;
        $altBodyCharSet = $this->CharSet;
        if ($altBodyEncoding == 8bit and !$this->has8bitChars($this->AltBody)) {
            $altBodyEncoding = 7bit;
            $altBodyCharSet = us-ascii;
        }
        switch ($this->message_type) {
            case inline:
                $body .= $this->getBoundary($this->boundary[1], $bodyCharSet, , $bodyEncoding);
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->attachAll(inline, $this->boundary[1]);
                break;
            case attach:
                $body .= $this->getBoundary($this->boundary[1], $bodyCharSet, , $bodyEncoding);
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->attachAll(attachment, $this->boundary[1]);
                break;
            case inline_attach:
                $body .= $this->textLine(-- . $this->boundary[1]);
                $body .= $this->headerLine(Content-Type, multipart/related;);
                $body .= $this->textLine("\tboundary=\"" . $this->boundary[2] . ");
                $body .= $this->LE;
                $body .= $this->getBoundary($this->boundary[2], $bodyCharSet, , $bodyEncoding);
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->attachAll(inline, $this->boundary[2]);
                $body .= $this->LE;
                $body .= $this->attachAll(attachment, $this->boundary[1]);
                break;
            case alt:
                $body .= $this->getBoundary($this->boundary[1], $altBodyCharSet, text/plain, $altBodyEncoding);
                $body .= $this->encodeString($this->AltBody, $altBodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->getBoundary($this->boundary[1], $bodyCharSet, text/html, $bodyEncoding);
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                $body .= $this->LE . $this->LE;
                if (!empty($this->Ical)) {
                    $body .= $this->getBoundary($this->boundary[1], , text/calendar; method=REQUEST, );
                    $body .= $this->encodeString($this->Ical, $this->Encoding);
                    $body .= $this->LE . $this->LE;
                }
                $body .= $this->endBoundary($this->boundary[1]);
                break;
            case alt_inline:
                $body .= $this->getBoundary($this->boundary[1], $altBodyCharSet, text/plain, $altBodyEncoding);
                $body .= $this->encodeString($this->AltBody, $altBodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->textLine(-- . $this->boundary[1]);
                $body .= $this->headerLine(Content-Type, multipart/related;);
                $body .= $this->textLine("\tboundary=\"" . $this->boundary[2] . ");
                $body .= $this->LE;
                $body .= $this->getBoundary($this->boundary[2], $bodyCharSet, text/html, $bodyEncoding);
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->attachAll(inline, $this->boundary[2]);
                $body .= $this->LE;
                $body .= $this->endBoundary($this->boundary[1]);
                break;
            case alt_attach:
                $body .= $this->textLine(-- . $this->boundary[1]);
                $body .= $this->headerLine(Content-Type, multipart/alternative;);
                $body .= $this->textLine("\tboundary=\"" . $this->boundary[2] . ");
                $body .= $this->LE;
                $body .= $this->getBoundary($this->boundary[2], $altBodyCharSet, text/plain, $altBodyEncoding);
                $body .= $this->encodeString($this->AltBody, $altBodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->getBoundary($this->boundary[2], $bodyCharSet, text/html, $bodyEncoding);
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->endBoundary($this->boundary[2]);
                $body .= $this->LE;
                $body .= $this->attachAll(attachment, $this->boundary[1]);
                break;
            case alt_inline_attach:
                $body .= $this->textLine(-- . $this->boundary[1]);
                $body .= $this->headerLine(Content-Type, multipart/alternative;);
                $body .= $this->textLine("\tboundary=\"" . $this->boundary[2] . ");
                $body .= $this->LE;
                $body .= $this->getBoundary($this->boundary[2], $altBodyCharSet, text/plain, $altBodyEncoding);
                $body .= $this->encodeString($this->AltBody, $altBodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->textLine(-- . $this->boundary[2]);
                $body .= $this->headerLine(Content-Type, multipart/related;);
                $body .= $this->textLine("\tboundary=\"" . $this->boundary[3] . ");
                $body .= $this->LE;
                $body .= $this->getBoundary($this->boundary[3], $bodyCharSet, text/html, $bodyEncoding);
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                $body .= $this->LE . $this->LE;
                $body .= $this->attachAll(inline, $this->boundary[3]);
                $body .= $this->LE;
                $body .= $this->endBoundary($this->boundary[2]);
                $body .= $this->LE;
                $body .= $this->attachAll(attachment, $this->boundary[1]);
                break;
            default:
                // catch case plain and case 
                $body .= $this->encodeString($this->Body, $bodyEncoding);
                break;
        }

        if ($this->isError()) {
            $body = ;
        } elseif ($this->sign_key_file) {
            try {
                if (!defined(PKCS7_TEXT)) {
                    throw new phpmailerException($this->lang(signing) .  OpenSSL extension missing.);
                }
                // @TODO would be nice to use php://temp streams here, but need to wrap for PHP < 5.1
                $file = tempnam(sys_get_temp_dir(), mail);
                if (false === file_put_contents($file, $body)) {
                    throw new phpmailerException($this->lang(signing) .  Could not write temp file);
                }
                $signed = tempnam(sys_get_temp_dir(), signed);
                if (@openssl_pkcs7_sign(
                    $file,
                    $signed,
                    file:// . realpath($this->sign_cert_file),
                    array(file:// . realpath($this->sign_key_file), $this->sign_key_pass),
                    null
                )
                ) {
                    @unlink($file);
                    $body = file_get_contents($signed);
                    @unlink($signed);
                } else {
                    @unlink($file);
                    @unlink($signed);
                    throw new phpmailerException($this->lang(signing) . openssl_error_string());
                }
            } catch (phpmailerException $exc) {
                $body = ;
                if ($this->exceptions) {
                    throw $exc;
                }
            }
        }
        return $body;
    }

    /**
     * Return the start of a message boundary.
     * @access protected
     * @param string $boundary
     * @param string $charSet
     * @param string $contentType
     * @param string $encoding
     * @return string
     */
    protected function getBoundary($boundary, $charSet, $contentType, $encoding)
    {
        $result = ;
        if ($charSet == ) {
            $charSet = $this->CharSet;
        }
        if ($contentType == ) {
            $contentType = $this->ContentType;
        }
        if ($encoding == ) {
            $encoding = $this->Encoding;
        }
        $result .= $this->textLine(-- . $boundary);
        $result .= sprintf(Content-Type: %s; charset=%s, $contentType, $charSet);
        $result .= $this->LE;
        // RFC1341 part 5 says 7bit is assumed if not specified
        if ($encoding != 7bit) {
            $result .= $this->headerLine(Content-Transfer-Encoding, $encoding);
        }
        $result .= $this->LE;

        return $result;
    }

    /**
     * Return the end of a message boundary.
     * @access protected
     * @param string $boundary
     * @return string
     */
    protected function endBoundary($boundary)
    {
        return $this->LE . -- . $boundary . -- . $this->LE;
    }

    /**
     * Set the message type.
     * PHPMailer only supports some preset message types,
     * not arbitrary MIME structures.
     * @access protected
     * @return void
     */
    protected function setMessageType()
    {
        $type = array();
        if ($this->alternativeExists()) {
            $type[] = alt;
        }
        if ($this->inlineImageExists()) {
            $type[] = inline;
        }
        if ($this->attachmentExists()) {
            $type[] = attach;
        }
        $this->message_type = implode(_, $type);
        if ($this->message_type == ) {
            $this->message_type = plain;
        }
    }

    /**
     * Format a header line.
     * @access public
     * @param string $name
     * @param string $value
     * @return string
     */
    public function headerLine($name, $value)
    {
        return $name . :  . $value . $this->LE;
    }

    /**
     * Return a formatted mail line.
     * @access public
     * @param string $value
     * @return string
     */
    public function textLine($value)
    {
        return $value . $this->LE;
    }

    /**
     * Add an attachment from a path on the filesystem.
     * Returns false if the file could not be found or read.
     * @param string $path Path to the attachment.
     * @param string $name Overrides the attachment name.
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type File extension (MIME) type.
     * @param string $disposition Disposition to use
     * @throws phpmailerException
     * @return boolean
     */
    public function addAttachment($path, $name = , $encoding = base64, $type = , $disposition = attachment)
    {
        try {
            if (!@is_file($path)) {
                throw new phpmailerException($this->lang(file_access) . $path, self::STOP_CONTINUE);
            }

            // If a MIME type is not specified, try to work it out from the file name
            if ($type == ) {
                $type = self::filenameToType($path);
            }

            $filename = basename($path);
            if ($name == ) {
                $name = $filename;
            }

            $this->attachment[] = array(
                0 => $path,
                1 => $filename,
                2 => $name,
                3 => $encoding,
                4 => $type,
                5 => false, // isStringAttachment
                6 => $disposition,
                7 => 0
            );

        } catch (phpmailerException $exc) {
            $this->setError($exc->getMessage());
            $this->edebug($exc->getMessage());
            if ($this->exceptions) {
                throw $exc;
            }
            return false;
        }
        return true;
    }

    /**
     * Return the array of attachments.
     * @return array
     */
    public function getAttachments()
    {
        return $this->attachment;
    }

    /**
     * Attach all file, string, and binary attachments to the message.
     * Returns an empty string on failure.
     * @access protected
     * @param string $disposition_type
     * @param string $boundary
     * @return string
     */
    protected function attachAll($disposition_type, $boundary)
    {
        // Return text of body
        $mime = array();
        $cidUniq = array();
        $incl = array();

        // Add all attachments
        foreach ($this->attachment as $attachment) {
            // Check if it is a valid disposition_filter
            if ($attachment[6] == $disposition_type) {
                // Check for string attachment
                $string = ;
                $path = ;
                $bString = $attachment[5];
                if ($bString) {
                    $string = $attachment[0];
                } else {
                    $path = $attachment[0];
                }

                $inclhash = md5(serialize($attachment));
                if (in_array($inclhash, $incl)) {
                    continue;
                }
                $incl[] = $inclhash;
                $name = $attachment[2];
                $encoding = $attachment[3];
                $type = $attachment[4];
                $disposition = $attachment[6];
                $cid = $attachment[7];
                if ($disposition == inline && isset($cidUniq[$cid])) {
                    continue;
                }
                $cidUniq[$cid] = true;

                $mime[] = sprintf(--%s%s, $boundary, $this->LE);
                $mime[] = sprintf(
                    Content-Type: %s; name="%s"%s,
                    $type,
                    $this->encodeHeader($this->secureHeader($name)),
                    $this->LE
                );
                // RFC1341 part 5 says 7bit is assumed if not specified
                if ($encoding != 7bit) {
                    $mime[] = sprintf(Content-Transfer-Encoding: %s%s, $encoding, $this->LE);
                }

                if ($disposition == inline) {
                    $mime[] = sprintf(Content-ID: <%s>%s, $cid, $this->LE);
                }

                // If a filename contains any of these chars, it should be quoted,
                // but not otherwise: RFC2183 & RFC2045 5.1
                // Fixes a warning in IETFs msglint MIME checker
                // Allow for bypassing the Content-Disposition header totally
                if (!(empty($disposition))) {
                    $encoded_name = $this->encodeHeader($this->secureHeader($name));
                    if (preg_match(/[ \(\)<>@,;:\\"\/\[\]\?=]/, $encoded_name)) {
                        $mime[] = sprintf(
                            Content-Disposition: %s; filename="%s"%s,
                            $disposition,
                            $encoded_name,
                            $this->LE . $this->LE
                        );
                    } else {
                        $mime[] = sprintf(
                            Content-Disposition: %s; filename=%s%s,
                            $disposition,
                            $encoded_name,
                            $this->LE . $this->LE
                        );
                    }
                } else {
                    $mime[] = $this->LE;
                }

                // Encode as string attachment
                if ($bString) {
                    $mime[] = $this->encodeString($string, $encoding);
                    if ($this->isError()) {
                        return ;
                    }
                    $mime[] = $this->LE . $this->LE;
                } else {
                    $mime[] = $this->encodeFile($path, $encoding);
                    if ($this->isError()) {
                        return ;
                    }
                    $mime[] = $this->LE . $this->LE;
                }
            }
        }

        $mime[] = sprintf(--%s--%s, $boundary, $this->LE);

        return implode(, $mime);
    }

    /**
     * Encode a file attachment in requested format.
     * Returns an empty string on failure.
     * @param string $path The full path to the file
     * @param string $encoding The encoding to use; one of base64, 7bit, 8bit, binary, quoted-printable
     * @throws phpmailerException
     * @see EncodeFile(encodeFile
     * @access protected
     * @return string
     */
    protected function encodeFile($path, $encoding = base64)
    {
        try {
            if (!is_readable($path)) {
                throw new phpmailerException($this->lang(file_open) . $path, self::STOP_CONTINUE);
            }
            $magic_quotes = get_magic_quotes_runtime();
            if ($magic_quotes) {
                if (version_compare(PHP_VERSION, 5.3.0, <)) {
                    set_magic_quotes_runtime(false);
                } else {
                    //Doesnt exist in PHP 5.4, but we dont need to check because
                    //get_magic_quotes_runtime always returns false in 5.4+
                    //so it will never get here
                    ini_set(magic_quotes_runtime, 0);
                }
            }
            $file_buffer = file_get_contents($path);
            $file_buffer = $this->encodeString($file_buffer, $encoding);
            if ($magic_quotes) {
                if (version_compare(PHP_VERSION, 5.3.0, <)) {
                    set_magic_quotes_runtime($magic_quotes);
                } else {
                    ini_set(magic_quotes_runtime, ($magic_quotes?1:0));
                }
            }
            return $file_buffer;
        } catch (Exception $exc) {
            $this->setError($exc->getMessage());
            return ;
        }
    }

    /**
     * Encode a string in requested format.
     * Returns an empty string on failure.
     * @param string $str The text to encode
     * @param string $encoding The encoding to use; one of base64, 7bit, 8bit, binary, quoted-printable
     * @access public
     * @return string
     */
    public function encodeString($str, $encoding = base64)
    {
        $encoded = ;
        switch (strtolower($encoding)) {
            case base64:
                $encoded = chunk_split(base64_encode($str), 76, $this->LE);
                break;
            case 7bit:
            case 8bit:
                $encoded = $this->fixEOL($str);
                // Make sure it ends with a line break
                if (substr($encoded, -(strlen($this->LE))) != $this->LE) {
                    $encoded .= $this->LE;
                }
                break;
            case binary:
                $encoded = $str;
                break;
            case quoted-printable:
                $encoded = $this->encodeQP($str);
                break;
            default:
                $this->setError($this->lang(encoding) . $encoding);
                break;
        }
        return $encoded;
    }

    /**
     * Encode a header string optimally.
     * Picks shortest of Q, B, quoted-printable or none.
     * @access public
     * @param string $str
     * @param string $position
     * @return string
     */
    public function encodeHeader($str, $position = text)
    {
        $matchcount = 0;
        switch (strtolower($position)) {
            case phrase:
                if (!preg_match(/[\200-\377]/, $str)) {
                    // Cant use addslashes as we dont know the value of magic_quotes_sybase
                    $encoded = addcslashes($str, "\0..\37\177\\\"");
                    if (($str == $encoded) && !preg_match(/[^A-Za-z0-9!#$%&\*+\/=?^_`{|}~ -]/, $str)) {
                        return ($encoded);
                    } else {
                        return ("\"$encoded\"");
                    }
                }
                $matchcount = preg_match_all(/[^\040\041\043-\133\135-\176]/, $str, $matches);
                break;
            /** @noinspection PhpMissingBreakStatementInspection */
            case comment:
                $matchcount = preg_match_all(/[()"]/, $str, $matches);
                // Intentional fall-through
            case text:
            default:
                $matchcount += preg_match_all(/[\000-\010\013\014\016-\037\177-\377]/, $str, $matches);
                break;
        }

        if ($matchcount == 0) { // There are no chars that need encoding
            return ($str);
        }

        $maxlen = 75 - 7 - strlen($this->CharSet);
        // Try to select the encoding which should produce the shortest output
        if ($matchcount > strlen($str) / 3) {
            // More than a third of the content will need encoding, so B encoding will be most efficient
            $encoding = B;
            if (function_exists(mb_strlen) && $this->hasMultiBytes($str)) {
                // Use a custom function which correctly encodes and wraps long
                // multibyte strings without breaking lines within a character
                $encoded = $this->base64EncodeWrapMB($str, "\n");
            } else {
                $encoded = base64_encode($str);
                $maxlen -= $maxlen % 4;
                $encoded = trim(chunk_split($encoded, $maxlen, "\n"));
            }
        } else {
            $encoding = Q;
            $encoded = $this->encodeQ($str, $position);
            $encoded = $this->wrapText($encoded, $maxlen, true);
            $encoded = str_replace(= . self::CRLF, "\n", trim($encoded));
        }

        $encoded = preg_replace(/^(.*)$/m,  =? . $this->CharSet . "?$encoding?\\1?=", $encoded);
        $encoded = trim(str_replace("\n", $this->LE, $encoded));

        return $encoded;
    }

    /**
     * Check if a string contains multi-byte characters.
     * @access public
     * @param string $str multi-byte text to wrap encode
     * @return boolean
     */
    public function hasMultiBytes($str)
    {
        if (function_exists(mb_strlen)) {
            return (strlen($str) > mb_strlen($str, $this->CharSet));
        } else { // Assume no multibytes (we cant handle without mbstring functions anyway)
            return false;
        }
    }

    /**
     * Does a string contain any 8-bit chars (in any charset)?
     * @param string $text
     * @return boolean
     */
    public function has8bitChars($text)
    {
        return (boolean)preg_match(/[\x80-\xFF]/, $text);
    }

    /**
     * Encode and wrap long multibyte strings for mail headers
     * without breaking lines within a character.
     * Adapted from a function by paravoid
     * @link http://www.php.net/manual/en/function.mb-encode-mimeheader.php#60283
     * @access public
     * @param string $str multi-byte text to wrap encode
     * @param string $linebreak string to use as linefeed/end-of-line
     * @return string
     */
    public function base64EncodeWrapMB($str, $linebreak = null)
    {
        $start = =? . $this->CharSet . ?B?;
        $end = ?=;
        $encoded = ;
        if ($linebreak === null) {
            $linebreak = $this->LE;
        }

        $mb_length = mb_strlen($str, $this->CharSet);
        // Each line must have length <= 75, including $start and $end
        $length = 75 - strlen($start) - strlen($end);
        // Average multi-byte ratio
        $ratio = $mb_length / strlen($str);
        // Base64 has a 4:3 ratio
        $avgLength = floor($length * $ratio * .75);

        for ($i = 0; $i < $mb_length; $i += $offset) {
            $lookBack = 0;
            do {
                $offset = $avgLength - $lookBack;
                $chunk = mb_substr($str, $i, $offset, $this->CharSet);
                $chunk = base64_encode($chunk);
                $lookBack++;
            } while (strlen($chunk) > $length);
            $encoded .= $chunk . $linebreak;
        }

        // Chomp the last linefeed
        $encoded = substr($encoded, 0, -strlen($linebreak));
        return $encoded;
    }

    /**
     * Encode a string in quoted-printable format.
     * According to RFC2045 section 6.7.
     * @access public
     * @param string $string The text to encode
     * @param integer $line_max Number of chars allowed on a line before wrapping
     * @return string
     * @link http://www.php.net/manual/en/function.quoted-printable-decode.php#89417 Adapted from this comment
     */
    public function encodeQP($string, $line_max = 76)
    {
        if (function_exists(quoted_printable_encode)) { // Use native function if its available (>= PHP5.3)
            return $this->fixEOL(quoted_printable_encode($string));
        }
        // Fall back to a pure PHP implementation
        $string = str_replace(
            array(%20, %0D%0A., %0D%0A, %),
            array( , "\r\n=2E", "\r\n", =),
            rawurlencode($string)
        );
        $string = preg_replace(/[^\r\n]{ . ($line_max - 3) . }[^=\r\n]{2}/, "$0=\r\n", $string);
        return $this->fixEOL($string);
    }

    /**
     * Backward compatibility wrapper for an old QP encoding function that was removed.
     * @see PHPMailer::encodeQP()
     * @access public
     * @param string $string
     * @param integer $line_max
     * @param boolean $space_conv
     * @return string
     * @deprecated Use encodeQP instead.
     */
    public function encodeQPphp(
        $string,
        $line_max = 76,
        /** @noinspection PhpUnusedParameterInspection */ $space_conv = false
    ) {
        return $this->encodeQP($string, $line_max);
    }

    /**
     * Encode a string using Q encoding.
     * @link http://tools.ietf.org/html/rfc2047
     * @param string $str the text to encode
     * @param string $position Where the text is going to be used, see the RFC for what that means
     * @access public
     * @return string
     */
    public function encodeQ($str, $position = text)
    {
        // There should not be any EOL in the string
        $pattern = ;
        $encoded = str_replace(array("\r", "\n"), , $str);
        switch (strtolower($position)) {
            case phrase:
                // RFC 2047 section 5.3
                $pattern = ^A-Za-z0-9!*+\/ -;
                break;
            /** @noinspection PhpMissingBreakStatementInspection */
            case comment:
                // RFC 2047 section 5.2
                $pattern = \(\)";
                // intentional fall-through
                // for this reason we build the $pattern without including delimiters and []
            case text:
            default:
                // RFC 2047 section 5.1
                // Replace every high ascii, control, =, ? and _ characters
                $pattern = \000-\011\013\014\016-\037\075\077\137\177-\377 . $pattern;
                break;
        }
        $matches = array();
        if (preg_match_all("/[{$pattern}]/", $encoded, $matches)) {
            // If the string contains an =, make sure its the first thing we replace
            // so as to avoid double-encoding
            $eqkey = array_search(=, $matches[0]);
            if (false !== $eqkey) {
                unset($matches[0][$eqkey]);
                array_unshift($matches[0], =);
            }
            foreach (array_unique($matches[0]) as $char) {
                $encoded = str_replace($char, = . sprintf(%02X, ord($char)), $encoded);
            }
        }
        // Replace every spaces to _ (more readable than =20)
        return str_replace( , _, $encoded);
    }


    /**
     * Add a string or binary attachment (non-filesystem).
     * This method can be used to attach ascii or binary data,
     * such as a BLOB record from a database.
     * @param string $string String attachment data.
     * @param string $filename Name of the attachment.
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type File extension (MIME) type.
     * @param string $disposition Disposition to use
     * @return void
     */
    public function addStringAttachment(
        $string,
        $filename,
        $encoding = base64,
        $type = ,
        $disposition = attachment
    ) {
        // If a MIME type is not specified, try to work it out from the file name
        if ($type == ) {
            $type = self::filenameToType($filename);
        }
        // Append to $attachment array
        $this->attachment[] = array(
            0 => $string,
            1 => $filename,
            2 => basename($filename),
            3 => $encoding,
            4 => $type,
            5 => true, // isStringAttachment
            6 => $disposition,
            7 => 0
        );
    }

    /**
     * Add an embedded (inline) attachment from a file.
     * This can include images, sounds, and just about any other document type.
     * These differ from regular attachments in that they are intended to be
     * displayed inline with the message, not just attached for download.
     * This is used in HTML messages that embed the images
     * the HTML refers to using the $cid value.
     * @param string $path Path to the attachment.
     * @param string $cid Content ID of the attachment; Use this to reference
     *        the content when using an embedded image in HTML.
     * @param string $name Overrides the attachment name.
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type File MIME type.
     * @param string $disposition Disposition to use
     * @return boolean True on successfully adding an attachment
     */
    public function addEmbeddedImage($path, $cid, $name = , $encoding = base64, $type = , $disposition = inline)
    {
        if (!@is_file($path)) {
            $this->setError($this->lang(file_access) . $path);
            return false;
        }

        // If a MIME type is not specified, try to work it out from the file name
        if ($type == ) {
            $type = self::filenameToType($path);
        }

        $filename = basename($path);
        if ($name == ) {
            $name = $filename;
        }

        // Append to $attachment array
        $this->attachment[] = array(
            0 => $path,
            1 => $filename,
            2 => $name,
            3 => $encoding,
            4 => $type,
            5 => false, // isStringAttachment
            6 => $disposition,
            7 => $cid
        );
        return true;
    }

    /**
     * Add an embedded stringified attachment.
     * This can include images, sounds, and just about any other document type.
     * Be sure to set the $type to an image type for images:
     * JPEG images use image/jpeg, GIF uses image/gif, PNG uses image/png.
     * @param string $string The attachment binary data.
     * @param string $cid Content ID of the attachment; Use this to reference
     *        the content when using an embedded image in HTML.
     * @param string $name
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type MIME type.
     * @param string $disposition Disposition to use
     * @return boolean True on successfully adding an attachment
     */
    public function addStringEmbeddedImage(
        $string,
        $cid,
        $name = ,
        $encoding = base64,
        $type = ,
        $disposition = inline
    ) {
        // If a MIME type is not specified, try to work it out from the name
        if ($type == ) {
            $type = self::filenameToType($name);
        }

        // Append to $attachment array
        $this->attachment[] = array(
            0 => $string,
            1 => $name,
            2 => $name,
            3 => $encoding,
            4 => $type,
            5 => true, // isStringAttachment
            6 => $disposition,
            7 => $cid
        );
        return true;
    }

    /**
     * Check if an inline attachment is present.
     * @access public
     * @return boolean
     */
    public function inlineImageExists()
    {
        foreach ($this->attachment as $attachment) {
            if ($attachment[6] == inline) {
                return true;
            }
        }
        return false;
    }

    /**
     * Check if an attachment (non-inline) is present.
     * @return boolean
     */
    public function attachmentExists()
    {
        foreach ($this->attachment as $attachment) {
            if ($attachment[6] == attachment) {
                return true;
            }
        }
        return false;
    }

    /**
     * Check if this message has an alternative body set.
     * @return boolean
     */
    public function alternativeExists()
    {
        return !empty($this->AltBody);
    }

    /**
     * Clear all To recipients.
     * @return void
     */
    public function clearAddresses()
    {
        foreach ($this->to as $to) {
            unset($this->all_recipients[strtolower($to[0])]);
        }
        $this->to = array();
    }

    /**
     * Clear all CC recipients.
     * @return void
     */
    public function clearCCs()
    {
        foreach ($this->cc as $cc) {
            unset($this->all_recipients[strtolower($cc[0])]);
        }
        $this->cc = array();
    }

    /**
     * Clear all BCC recipients.
     * @return void
     */
    public function clearBCCs()
    {
        foreach ($this->bcc as $bcc) {
            unset($this->all_recipients[strtolower($bcc[0])]);
        }
        $this->bcc = array();
    }

    /**
     * Clear all ReplyTo recipients.
     * @return void
     */
    public function clearReplyTos()
    {
        $this->ReplyTo = array();
    }

    /**
     * Clear all recipient types.
     * @return void
     */
    public function clearAllRecipients()
    {
        $this->to = array();
        $this->cc = array();
        $this->bcc = array();
        $this->all_recipients = array();
    }

    /**
     * Clear all filesystem, string, and binary attachments.
     * @return void
     */
    public function clearAttachments()
    {
        $this->attachment = array();
    }

    /**
     * Clear all custom headers.
     * @return void
     */
    public function clearCustomHeaders()
    {
        $this->CustomHeader = array();
    }

    /**
     * Add an error message to the error container.
     * @access protected
     * @param string $msg
     * @return void
     */
    protected function setError($msg)
    {
        $this->error_count++;
        if ($this->Mailer == smtp and !is_null($this->smtp)) {
            $lasterror = $this->smtp->getError();
            if (!empty($lasterror) and array_key_exists(smtp_msg, $lasterror)) {
                $msg .= <p> . $this->lang(smtp_error) . $lasterror[smtp_msg] . "</p>\n";
            }
        }
        $this->ErrorInfo = $msg;
    }

    /**
     * Return an RFC 822 formatted date.
     * @access public
     * @return string
     * @static
     */
    public static function rfcDate()
    {
        // Set the time zone to whatever the default is to avoid 500 errors
        // Will default to UTC if its not set properly in php.ini
        date_default_timezone_set(@date_default_timezone_get());
        return date(D, j M Y H:i:s O);
    }

    /**
     * Get the server hostname.
     * Returns localhost.localdomain if unknown.
     * @access protected
     * @return string
     */
    protected function serverHostname()
    {
        $result = localhost.localdomain;
        if (!empty($this->Hostname)) {
            $result = $this->Hostname;
        } elseif (isset($_SERVER) and array_key_exists(SERVER_NAME, $_SERVER) and !empty($_SERVER[SERVER_NAME])) {
            $result = $_SERVER[SERVER_NAME];
        } elseif (function_exists(gethostname) && gethostname() !== false) {
            $result = gethostname();
        } elseif (php_uname(n) !== false) {
            $result = php_uname(n);
        }
        return $result;
    }

    /**
     * Get an error message in the current language.
     * @access protected
     * @param string $key
     * @return string
     */
    protected function lang($key)
    {
        if (count($this->language) < 1) {
            $this->setLanguage(en); // set the default language
        }

        if (isset($this->language[$key])) {
            return $this->language[$key];
        } else {
            return Language string failed to load:  . $key;
        }
    }

    /**
     * Check if an error occurred.
     * @access public
     * @return boolean True if an error did occur.
     */
    public function isError()
    {
        return ($this->error_count > 0);
    }

    /**
     * Ensure consistent line endings in a string.
     * Changes every end of line from CRLF, CR or LF to $this->LE.
     * @access public
     * @param string $str String to fixEOL
     * @return string
     */
    public function fixEOL($str)
    {
        // Normalise to \n
        $nstr = str_replace(array("\r\n", "\r"), "\n", $str);
        // Now convert LE as needed
        if ($this->LE !== "\n") {
            $nstr = str_replace("\n", $this->LE, $nstr);
        }
        return $nstr;
    }

    /**
     * Add a custom header.
     * $name value can be overloaded to contain
     * both header name and value (name:value)
     * @access public
     * @param string $name Custom header name
     * @param string $value Header value
     * @return void
     */
    public function addCustomHeader($name, $value = null)
    {
        if ($value === null) {
            // Value passed in as name:value
            $this->CustomHeader[] = explode(:, $name, 2);
        } else {
            $this->CustomHeader[] = array($name, $value);
        }
    }

    /**
     * Create a message from an HTML string.
     * Automatically makes modifications for inline images and backgrounds
     * and creates a plain-text version by converting the HTML.
     * Overwrites any existing values in $this->Body and $this->AltBody
     * @access public
     * @param string $message HTML message string
     * @param string $basedir baseline directory for path
     * @param boolean|callable $advanced Whether to use the internal HTML to text converter
     *    or your own custom converter @see html2text()
     * @return string $message
     */
    public function msgHTML($message, $basedir = , $advanced = false)
    {
        preg_match_all(/(src|background)=["\](.*)["\]/Ui, $message, $images);
        if (isset($images[2])) {
            foreach ($images[2] as $imgindex => $url) {
                // Convert data URIs into embedded images
                if (preg_match(#^data:(image[^;,]*)(;base64)?,#, $url, $match)) {
                    $data = substr($url, strpos($url, ,));
                    if ($match[2]) {
                        $data = base64_decode($data);
                    } else {
                        $data = rawurldecode($data);
                    }
                    $cid = md5($url) . @phpmailer.0; // RFC2392 S 2
                    if ($this->addStringEmbeddedImage($data, $cid, , base64, $match[1])) {
                        $message = str_replace(
                            $images[0][$imgindex],
                            $images[1][$imgindex] . ="cid: . $cid . ",
                            $message
                        );
                    }
                } elseif (!preg_match(#^[A-z]+://#, $url)) {
                    // Do not change urls for absolute images (thanks to corvuscorax)
                    $filename = basename($url);
                    $directory = dirname($url);
                    if ($directory == .) {
                        $directory = ;
                    }
                    $cid = md5($url) . @phpmailer.0; // RFC2392 S 2
                    if (strlen($basedir) > 1 && substr($basedir, -1) != /) {
                        $basedir .= /;
                    }
                    if (strlen($directory) > 1 && substr($directory, -1) != /) {
                        $directory .= /;
                    }
                    if ($this->addEmbeddedImage(
                        $basedir . $directory . $filename,
                        $cid,
                        $filename,
                        base64,
                        self::_mime_types((string)self::mb_pathinfo($filename, PATHINFO_EXTENSION))
                    )
                    ) {
                        $message = preg_replace(
                            / . $images[1][$imgindex] . =["\] . preg_quote($url, /) . ["\]/Ui,
                            $images[1][$imgindex] . ="cid: . $cid . ",
                            $message
                        );
                    }
                }
            }
        }
        $this->isHTML(true);
        // Convert all message body line breaks to CRLF, makes quoted-printable encoding work much better
        $this->Body = $this->normalizeBreaks($message);
        $this->AltBody = $this->normalizeBreaks($this->html2text($message, $advanced));
        if (empty($this->AltBody)) {
            $this->AltBody = To view this email message, open it in a program that understands HTML! .
                self::CRLF . self::CRLF;
        }
        return $this->Body;
    }

    /**
     * Convert an HTML string into plain text.
     * This is used by msgHTML().
     * Note - older versions of this function used a bundled advanced converter
     * which was been removed for license reasons in #232
     * Example usage:
     * <code>
     * // Use default conversion
     * $plain = $mail->html2text($html);
     * // Use your own custom converter
     * $plain = $mail->html2text($html, function($html) {
     *     $converter = new MyHtml2text($html);
     *     return $converter->get_text();
     * });
     * </code>
     * @param string $html The HTML text to convert
     * @param boolean|callable $advanced Any boolean value to use the internal converter,
     *   or provide your own callable for custom conversion.
     * @return string
     */
    public function html2text($html, $advanced = false)
    {
        if (is_callable($advanced)) {
            return call_user_func($advanced, $html);
        }
        return html_entity_decode(
            trim(strip_tags(preg_replace(/<(head|title|style|script)[^>]*>.*?<\/\\1>/si, , $html))),
            ENT_QUOTES,
            $this->CharSet
        );
    }

    /**
     * Get the MIME type for a file extension.
     * @param string $ext File extension
     * @access public
     * @return string MIME type of file.
     * @static
     */
    public static function _mime_types($ext = )
    {
        $mimes = array(
            xl    => application/excel,
            js    => application/javascript,
            hqx   => application/mac-binhex40,
            cpt   => application/mac-compactpro,
            bin   => application/macbinary,
            doc   => application/msword,
            word  => application/msword,
            class => application/octet-stream,
            dll   => application/octet-stream,
            dms   => application/octet-stream,
            exe   => application/octet-stream,
            lha   => application/octet-stream,
            lzh   => application/octet-stream,
            psd   => application/octet-stream,
            sea   => application/octet-stream,
            so    => application/octet-stream,
            oda   => application/oda,
            pdf   => application/pdf,
            ai    => application/postscript,
            eps   => application/postscript,
            ps    => application/postscript,
            smi   => application/smil,
            smil  => application/smil,
            mif   => application/vnd.mif,
            xls   => application/vnd.ms-excel,
            ppt   => application/vnd.ms-powerpoint,
            wbxml => application/vnd.wap.wbxml,
            wmlc  => application/vnd.wap.wmlc,
            dcr   => application/x-director,
            dir   => application/x-director,
            dxr   => application/x-director,
            dvi   => application/x-dvi,
            gtar  => application/x-gtar,
            php3  => application/x-httpd-php,
            php4  => application/x-httpd-php,
            php   => application/x-httpd-php,
            phtml => application/x-httpd-php,
            phps  => application/x-httpd-php-source,
            swf   => application/x-shockwave-flash,
            sit   => application/x-stuffit,
            tar   => application/x-tar,
            tgz   => application/x-tar,
            xht   => application/xhtml+xml,
            xhtml => application/xhtml+xml,
            zip   => application/zip,
            mid   => audio/midi,
            midi  => audio/midi,
            mp2   => audio/mpeg,
            mp3   => audio/mpeg,
            mpga  => audio/mpeg,
            aif   => audio/x-aiff,
            aifc  => audio/x-aiff,
            aiff  => audio/x-aiff,
            ram   => audio/x-pn-realaudio,
            rm    => audio/x-pn-realaudio,
            rpm   => audio/x-pn-realaudio-plugin,
            ra    => audio/x-realaudio,
            wav   => audio/x-wav,
            bmp   => image/bmp,
            gif   => image/gif,
            jpeg  => image/jpeg,
            jpe   => image/jpeg,
            jpg   => image/jpeg,
            png   => image/png,
            tiff  => image/tiff,
            tif   => image/tiff,
            eml   => message/rfc822,
            css   => text/css,
            html  => text/html,
            htm   => text/html,
            shtml => text/html,
            log   => text/plain,
            text  => text/plain,
            txt   => text/plain,
            rtx   => text/richtext,
            rtf   => text/rtf,
            vcf   => text/vcard,
            vcard => text/vcard,
            xml   => text/xml,
            xsl   => text/xml,
            mpeg  => video/mpeg,
            mpe   => video/mpeg,
            mpg   => video/mpeg,
            mov   => video/quicktime,
            qt    => video/quicktime,
            rv    => video/vnd.rn-realvideo,
            avi   => video/x-msvideo,
            movie => video/x-sgi-movie
        );
        return (array_key_exists(strtolower($ext), $mimes) ? $mimes[strtolower($ext)]: application/octet-stream);
    }

    /**
     * Map a file name to a MIME type.
     * Defaults to application/octet-stream, i.e.. arbitrary binary data.
     * @param string $filename A file name or full path, does not need to exist as a file
     * @return string
     * @static
     */
    public static function filenameToType($filename)
    {
        // In case the path is a URL, strip any query string before getting extension
        $qpos = strpos($filename, ?);
        if (false !== $qpos) {
            $filename = substr($filename, 0, $qpos);
        }
        $pathinfo = self::mb_pathinfo($filename);
        return self::_mime_types($pathinfo[extension]);
    }

    /**
     * Multi-byte-safe pathinfo replacement.
     * Drop-in replacement for pathinfo(), but multibyte-safe, cross-platform-safe, old-version-safe.
     * Works similarly to the one in PHP >= 5.2.0
     * @link http://www.php.net/manual/en/function.pathinfo.php#107461
     * @param string $path A filename or path, does not need to exist as a file
     * @param integer|string $options Either a PATHINFO_* constant,
     *      or a string name to return only the specified piece, allows filename to work on PHP < 5.2
     * @return string|array
     * @static
     */
    public static function mb_pathinfo($path, $options = null)
    {
        $ret = array(dirname => , basename => , extension => , filename => );
        $pathinfo = array();
        if (preg_match(%^(.*?)[\\\\/]*(([^/\\\\]*?)(\.([^\.\\\\/]+?)|))[\\\\/\.]*$%im, $path, $pathinfo)) {
            if (array_key_exists(1, $pathinfo)) {
                $ret[dirname] = $pathinfo[1];
            }
            if (array_key_exists(2, $pathinfo)) {
                $ret[basename] = $pathinfo[2];
            }
            if (array_key_exists(5, $pathinfo)) {
                $ret[extension] = $pathinfo[5];
            }
            if (array_key_exists(3, $pathinfo)) {
                $ret[filename] = $pathinfo[3];
            }
        }
        switch ($options) {
            case PATHINFO_DIRNAME:
            case dirname:
                return $ret[dirname];
            case PATHINFO_BASENAME:
            case basename:
                return $ret[basename];
            case PATHINFO_EXTENSION:
            case extension:
                return $ret[extension];
            case PATHINFO_FILENAME:
            case filename:
                return $ret[filename];
            default:
                return $ret;
        }
    }

    /**
     * Set or reset instance properties.
     * You should avoid this function - its more verbose, less efficient, more error-prone and
     * harder to debug than setting properties directly.
     * Usage Example:
     * `$mail->set(SMTPSecure, tls);`
     *   is the same as:
     * `$mail->SMTPSecure = tls;`
     * @access public
     * @param string $name The property name to set
     * @param mixed $value The value to set the property to
     * @return boolean
     * @TODO Should this not be using the __set() magic function?
     */
    public function set($name, $value = )
    {
        if (property_exists($this, $name)) {
            $this->$name = $value;
            return true;
        } else {
            $this->setError($this->lang(variable_set) . $name);
            return false;
        }
    }

    /**
     * Strip newlines to prevent header injection.
     * @access public
     * @param string $str
     * @return string
     */
    public function secureHeader($str)
    {
        return trim(str_replace(array("\r", "\n"), , $str));
    }

    /**
     * Normalize line breaks in a string.
     * Converts UNIX LF, Mac CR and Windows CRLF line breaks into a single line break format.
     * Defaults to CRLF (for message bodies) and preserves consecutive breaks.
     * @param string $text
     * @param string $breaktype What kind of line break to use, defaults to CRLF
     * @return string
     * @access public
     * @static
     */
    public static function normalizeBreaks($text, $breaktype = "\r\n")
    {
        return preg_replace(/(\r\n|\r|\n)/ms, $breaktype, $text);
    }


    /**
     * Set the public and private key files and password for S/MIME signing.
     * @access public
     * @param string $cert_filename
     * @param string $key_filename
     * @param string $key_pass Password for private key
     */
    public function sign($cert_filename, $key_filename, $key_pass)
    {
        $this->sign_cert_file = $cert_filename;
        $this->sign_key_file = $key_filename;
        $this->sign_key_pass = $key_pass;
    }

    /**
     * Quoted-Printable-encode a DKIM header.
     * @access public
     * @param string $txt
     * @return string
     */
    public function DKIM_QP($txt)
    {
        $line = ;
        for ($i = 0; $i < strlen($txt); $i++) {
            $ord = ord($txt[$i]);
            if (((0x21 <= $ord) && ($ord <= 0x3A)) || $ord == 0x3C || ((0x3E <= $ord) && ($ord <= 0x7E))) {
                $line .= $txt[$i];
            } else {
                $line .= = . sprintf(%02X, $ord);
            }
        }
        return $line;
    }

    /**
     * Generate a DKIM signature.
     * @access public
     * @param string $signHeader
     * @throws phpmailerException
     * @return string
     */
    public function DKIM_Sign($signHeader)
    {
        if (!defined(PKCS7_TEXT)) {
            if ($this->exceptions) {
                throw new phpmailerException($this->lang(signing) .  OpenSSL extension missing.);
            }
            return ;
        }
        $privKeyStr = file_get_contents($this->DKIM_private);
        if ($this->DKIM_passphrase != ) {
            $privKey = openssl_pkey_get_private($privKeyStr, $this->DKIM_passphrase);
        } else {
            $privKey = $privKeyStr;
        }
        if (openssl_sign($signHeader, $signature, $privKey)) {
            return base64_encode($signature);
        }
        return ;
    }

    /**
     * Generate a DKIM canonicalization header.
     * @access public
     * @param string $signHeader Header
     * @return string
     */
    public function DKIM_HeaderC($signHeader)
    {
        $signHeader = preg_replace(/\r\n\s+/,  , $signHeader);
        $lines = explode("\r\n", $signHeader);
        foreach ($lines as $key => $line) {
            list($heading, $value) = explode(:, $line, 2);
            $heading = strtolower($heading);
            $value = preg_replace(/\s+/,  , $value); // Compress useless spaces
            $lines[$key] = $heading . : . trim($value); // Dont forget to remove WSP around the value
        }
        $signHeader = implode("\r\n", $lines);
        return $signHeader;
    }

    /**
     * Generate a DKIM canonicalization body.
     * @access public
     * @param string $body Message Body
     * @return string
     */
    public function DKIM_BodyC($body)
    {
        if ($body == ) {
            return "\r\n";
        }
        // stabilize line endings
        $body = str_replace("\r\n", "\n", $body);
        $body = str_replace("\n", "\r\n", $body);
        // END stabilize line endings
        while (substr($body, strlen($body) - 4, 4) == "\r\n\r\n") {
            $body = substr($body, 0, strlen($body) - 2);
        }
        return $body;
    }

    /**
     * Create the DKIM header and body in a new message header.
     * @access public
     * @param string $headers_line Header lines
     * @param string $subject Subject
     * @param string $body Body
     * @return string
     */
    public function DKIM_Add($headers_line, $subject, $body)
    {
        $DKIMsignatureType = rsa-sha1; // Signature & hash algorithms
        $DKIMcanonicalization = relaxed/simple; // Canonicalization of header/body
        $DKIMquery = dns/txt; // Query method
        $DKIMtime = time(); // Signature Timestamp = seconds since 00:00:00 - Jan 1, 1970 (UTC time zone)
        $subject_header = "Subject: $subject";
        $headers = explode($this->LE, $headers_line);
        $from_header = ;
        $to_header = ;
        $current = ;
        foreach ($headers as $header) {
            if (strpos($header, From:) === 0) {
                $from_header = $header;
                $current = from_header;
            } elseif (strpos($header, To:) === 0) {
                $to_header = $header;
                $current = to_header;
            } else {
                if ($current && strpos($header,  =?) === 0) {
                    $current .= $header;
                } else {
                    $current = ;
                }
            }
        }
        $from = str_replace(|, =7C, $this->DKIM_QP($from_header));
        $to = str_replace(|, =7C, $this->DKIM_QP($to_header));
        $subject = str_replace(
            |,
            =7C,
            $this->DKIM_QP($subject_header)
        ); // Copied header fields (dkim-quoted-printable)
        $body = $this->DKIM_BodyC($body);
        $DKIMlen = strlen($body); // Length of body
        $DKIMb64 = base64_encode(pack(H*, sha1($body))); // Base64 of packed binary SHA-1 hash of body
        $ident = ($this->DKIM_identity == ) ?  :  i= . $this->DKIM_identity . ;;
        $dkimhdrs = DKIM-Signature: v=1; a= .
            $DKIMsignatureType . ; q= .
            $DKIMquery . ; l= .
            $DKIMlen . ; s= .
            $this->DKIM_selector .
            ";\r\n" .
            "\tt=" . $DKIMtime . ; c= . $DKIMcanonicalization . ";\r\n" .
            "\th=From:To:Subject;\r\n" .
            "\td=" . $this->DKIM_domain . ; . $ident . "\r\n" .
            "\tz=$from\r\n" .
            "\t|$to\r\n" .
            "\t|$subject;\r\n" .
            "\tbh=" . $DKIMb64 . ";\r\n" .
            "\tb=";
        $toSign = $this->DKIM_HeaderC(
            $from_header . "\r\n" . $to_header . "\r\n" . $subject_header . "\r\n" . $dkimhdrs
        );
        $signed = $this->DKIM_Sign($toSign);
        return $dkimhdrs . $signed . "\r\n";
    }

    /**
     * Allows for public read access to to property.
     * @access public
     * @return array
     */
    public function getToAddresses()
    {
        return $this->to;
    }

    /**
     * Allows for public read access to cc property.
     * @access public
     * @return array
     */
    public function getCcAddresses()
    {
        return $this->cc;
    }

    /**
     * Allows for public read access to bcc property.
     * @access public
     * @return array
     */
    public function getBccAddresses()
    {
        return $this->bcc;
    }

    /**
     * Allows for public read access to ReplyTo property.
     * @access public
     * @return array
     */
    public function getReplyToAddresses()
    {
        return $this->ReplyTo;
    }

    /**
     * Allows for public read access to all_recipients property.
     * @access public
     * @return array
     */
    public function getAllRecipientAddresses()
    {
        return $this->all_recipients;
    }

    /**
     * Perform a callback.
     * @param boolean $isSent
     * @param array $to
     * @param array $cc
     * @param array $bcc
     * @param string $subject
     * @param string $body
     * @param string $from
     */
    protected function doCallback($isSent, $to, $cc, $bcc, $subject, $body, $from)
    {
        if (!empty($this->action_function) && is_callable($this->action_function)) {
            $params = array($isSent, $to, $cc, $bcc, $subject, $body, $from);
            call_user_func_array($this->action_function, $params);
        }
    }
}

/**
 * PHPMailer exception handler
 * @package PHPMailer
 */
class phpmailerException extends Exception
{
    /**
     * Prettify error message output
     * @return string
     */
    public function errorMessage()
    {
        $errorMsg = <strong> . $this->getMessage() . "</strong><br />\n";
        return $errorMsg;
    }
}