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xtemplate.class.php
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xtemplate.class.php
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<?php
// When developing uncomment the line below, re-comment before making public
//error_reporting(E_ALL);
/**
* XTemplate PHP templating engine
*
* @package XTemplate
* @author Barnabas Debreceni [[email protected]]
* @copyright Barnabas Debreceni 2000-2001
* @author Jeremy Coates [[email protected]]
* @copyright Jeremy Coates 2002-2007
* @see license.txt LGPL / BSD license
* @since PHP 5
* @link $HeadURL: https://xtpl.svn.sourceforge.net/svnroot/xtpl/trunk/xtemplate.class.php $
* @version $Id: xtemplate.class.php 21 2007-05-29 18:01:15Z cocomp $
*
*
* XTemplate class - http://www.phpxtemplate.org/ (x)html / xml generation with templates - fast & easy
* Latest stable & Subversion versions available @ http://sourceforge.net/projects/xtpl/
* License: LGPL / BSD - see license.txt
* Changelog: see changelog.txt
*/
class XTemplate {
/**
* Properties
*/
/**
* Raw contents of the template file
*
* @access public
* @var string
*/
public $filecontents = '';
/**
* Unparsed blocks
*
* @access public
* @var array
*/
public $blocks = array();
/**
* Parsed blocks
*
* @var unknown_type
*/
public $parsed_blocks = array();
/**
* Preparsed blocks (for file includes)
*
* @access public
* @var array
*/
public $preparsed_blocks = array();
/**
* Block parsing order for recursive parsing
* (Sometimes reverse :)
*
* @access public
* @var array
*/
public $block_parse_order = array();
/**
* Store sub-block names
* (For fast resetting)
*
* @access public
* @var array
*/
public $sub_blocks = array();
/**
* Variables array
*
* @access public
* @var array
*/
public $vars = array();
/**
* File variables array
*
* @access public
* @var array
*/
public $filevars = array();
/**
* Filevars' parent block
*
* @access public
* @var array
*/
public $filevar_parent = array();
/**
* File caching during duration of script
* e.g. files only cached to speed {FILE "filename"} repeats
*
* @access public
* @var array
*/
public $filecache = array();
/**
* Location of template files
*
* @access public
* @var string
*/
public $tpldir = '';
/**
* Filenames lookup table
*
* @access public
* @var null
*/
public $files = null;
/**
* Template filename
*
* @access public
* @var string
*/
public $filename = '';
// moved to setup method so uses the tag_start & end_delims
/**
* RegEx for file includes
*
* "/\{FILE\s*\"([^\"]+)\"\s*\}/m";
*
* @access public
* @var string
*/
public $file_delim = '';
/**
* RegEx for file include variable
*
* "/\{FILE\s*\{([A-Za-z0-9\._]+?)\}\s*\}/m";
*
* @access public
* @var string
*/
public $filevar_delim = '';
/**
* RegEx for file includes with newlines
*
* "/^\s*\{FILE\s*\{([A-Za-z0-9\._]+?)\}\s*\}\s*\n/m";
*
* @access public
* @var string
*/
public $filevar_delim_nl = '';
/**
* Template block start delimiter
*
* @access public
* @var string
*/
public $block_start_delim = '<!-- ';
/**
* Template block end delimiter
*
* @access public
* @var string
*/
public $block_end_delim = '-->';
/**
* Template block start word
*
* @access public
* @var string
*/
public $block_start_word = 'BEGIN:';
/**
* Template block end word
*
* The last 3 properties and this make the delimiters look like:
* @example <!-- BEGIN: block_name -->
* if you use the default syntax.
*
* @access public
* @var string
*/
public $block_end_word = 'END:';
/**
* Template tag start delimiter
*
* This makes the delimiters look like:
* @example {tagname}
* if you use the default syntax.
*
* @access public
* @var string
*/
public $tag_start_delim = '{';
/**
* Template tag end delimiter
*
* This makes the delimiters look like:
* @example {tagname}
* if you use the default syntax.
*
* @access public
* @var string
*/
public $tag_end_delim = '}';
/* this makes the delimiters look like: {tagname} if you use my syntax. */
/**
* Regular expression element for comments within tags and blocks
*
* @example {tagname#My Comment}
* @example {tagname #My Comment}
* @example <!-- BEGIN: blockname#My Comment -->
* @example <!-- BEGIN: blockname #My Comment -->
*
* @access public
* @var string
*/
public $comment_preg = '( ?#.*?)?';
/**
* Default main template block name
*
* @access public
* @var string
*/
public $mainblock = 'main';
/**
* Script output type
*
* @access public
* @var string
*/
public $output_type = 'HTML';
/**
* Debug mode
*
* @access public
* @var boolean
*/
public $debug = false;
/**
* Null string for unassigned vars
*
* @access protected
* @var array
*/
protected $_null_string = array('' => '');
/**
* Null string for unassigned blocks
*
* @access protected
* @var array
*/
protected $_null_block = array('' => '');
/**
* Errors
*
* @access protected
* @var string
*/
protected $_error = '';
/**
* Auto-reset sub blocks
*
* @access protected
* @var boolean
*/
protected $_autoreset = true;
/**
* Set to FALSE to generate errors if a non-existant blocks is referenced
*
* @author NW
* @since 2002/10/17
* @access protected
* @var boolean
*/
protected $_ignore_missing_blocks = true;
/**
* PHP 5 Constructor - Instantiate the object
*
* @param string $file Template file to work on
* @param string/array $tpldir Location of template files (useful for keeping files outside web server root)
* @param array $files Filenames lookup
* @param string $mainblock Name of main block in the template
* @param boolean $autosetup If true, run setup() as part of constuctor
* @return XTemplate
*/
public function __construct($file, $tpldir = '', $files = null, $mainblock = 'main', $autosetup = true) {
$this->restart($file, $tpldir, $files, $mainblock, $autosetup, $this->tag_start_delim, $this->tag_end_delim);
}
/**
* PHP 4 Constructor - Instantiate the object
*
* @deprecated Use PHP 5 constructor instead
* @param string $file Template file to work on
* @param string/array $tpldir Location of template files (useful for keeping files outside web server root)
* @param array $files Filenames lookup
* @param string $mainblock Name of main block in the template
* @param boolean $autosetup If true, run setup() as part of constuctor
* @return XTemplate
*/
public function XTemplate ($file, $tpldir = '', $files = null, $mainblock = 'main', $autosetup = true) {
assert('Deprecated - use PHP 5 constructor');
}
/***************************************************************************/
/***[ public stuff ]********************************************************/
/***************************************************************************/
/**
* Restart the class - allows one instantiation with several files processed by restarting
* e.g. $xtpl = new XTemplate('file1.xtpl');
* $xtpl->parse('main');
* $xtpl->out('main');
* $xtpl->restart('file2.xtpl');
* $xtpl->parse('main');
* $xtpl->out('main');
* (Added in response to sf:641407 feature request)
*
* @param string $file Template file to work on
* @param string/array $tpldir Location of template files
* @param array $files Filenames lookup
* @param string $mainblock Name of main block in the template
* @param boolean $autosetup If true, run setup() as part of restarting
* @param string $tag_start {
* @param string $tag_end }
*/
public function restart ($file, $tpldir = '', $files = null, $mainblock = 'main', $autosetup = true, $tag_start = '{', $tag_end = '}') {
$this->filename = $file;
// From SF Feature request 1202027
// Kenneth Kalmer
$this->tpldir = $tpldir;
if (defined('XTPL_DIR') && empty($this->tpldir)) {
$this->tpldir = XTPL_DIR;
}
if (is_array($files)) {
$this->files = $files;
}
$this->mainblock = $mainblock;
$this->tag_start_delim = $tag_start;
$this->tag_end_delim = $tag_end;
// Start with fresh file contents
$this->filecontents = '';
// Reset the template arrays
$this->blocks = array();
$this->parsed_blocks = array();
$this->preparsed_blocks = array();
$this->block_parse_order = array();
$this->sub_blocks = array();
$this->vars = array();
$this->filevars = array();
$this->filevar_parent = array();
$this->filecache = array();
if ($autosetup) {
$this->setup();
}
}
/**
* setup - the elements that were previously in the constructor
*
* @access public
* @param boolean $add_outer If true is passed when called, it adds an outer main block to the file
*/
public function setup ($add_outer = false) {
$this->tag_start_delim = preg_quote($this->tag_start_delim);
$this->tag_end_delim = preg_quote($this->tag_end_delim);
// Setup the file delimiters
// regexp for file includes
$this->file_delim = "/" . $this->tag_start_delim . "FILE\s*\"([^\"]+)\"" . $this->comment_preg . $this->tag_end_delim . "/m";
// regexp for file includes
$this->filevar_delim = "/" . $this->tag_start_delim . "FILE\s*" . $this->tag_start_delim . "([A-Za-z0-9\._]+?)" . $this->comment_preg . $this->tag_end_delim . $this->comment_preg . $this->tag_end_delim . "/m";
// regexp for file includes w/ newlines
$this->filevar_delim_nl = "/^\s*" . $this->tag_start_delim . "FILE\s*" . $this->tag_start_delim . "([A-Za-z0-9\._]+?)" . $this->comment_preg . $this->tag_end_delim . $this->comment_preg . $this->tag_end_delim . "\s*\n/m";
if (empty($this->filecontents)) {
// read in template file
$this->filecontents = $this->_r_getfile($this->filename);
}
if ($add_outer) {
$this->_add_outer_block();
}
// preprocess some stuff
$this->blocks = $this->_maketree($this->filecontents, '');
$this->filevar_parent = $this->_store_filevar_parents($this->blocks);
$this->scan_globals();
}
/**
* assign a variable
*
* @example Simplest case:
* @example $xtpl->assign('name', 'value');
* @example {name} in template
*
* @example Array assign:
* @example $xtpl->assign(array('name' => 'value', 'name2' => 'value2'));
* @example {name} {name2} in template
*
* @example Value as array assign:
* @example $xtpl->assign('name', array('key' => 'value', 'key2' => 'value2'));
* @example {name.key} {name.key2} in template
*
* @example Reset array:
* @example $xtpl->assign('name', array('key' => 'value', 'key2' => 'value2'));
* @example // Other code then:
* @example $xtpl->assign('name', array('key3' => 'value3'), false);
* @example {name.key} {name.key2} {name.key3} in template
*
* @access public
* @param string $name Variable to assign $val to
* @param string / array $val Value to assign to $name
* @param boolean $reset_array Reset the variable array if $val is an array
*/
public function assign ($name, $val = '', $reset_array = true) {
if (is_array($name)) {
foreach ($name as $k => $v) {
$this->vars[$k] = $v;
}
} elseif (is_array($val)) {
// Clear the existing values
if ($reset_array) {
$this->vars[$name] = array();
}
foreach ($val as $k => $v) {
$this->vars[$name][$k] = $v;
}
} else {
$this->vars[$name] = $val;
}
}
/**
* assign a file variable
*
* @access public
* @param string $name Variable to assign $val to
* @param string / array $val Values to assign to $name
*/
public function assign_file ($name, $val = '') {
if (is_array($name)) {
foreach ($name as $k => $v) {
$this->_assign_file_sub($k, $v);
}
} else {
$this->_assign_file_sub($name, $val);
}
}
/**
* parse a block
*
* @access public
* @param string $bname Block name to parse
*/
public function parse ($bname) {
if (isset($this->preparsed_blocks[$bname])) {
$copy = $this->preparsed_blocks[$bname];
} elseif (isset($this->blocks[$bname])) {
$copy = $this->blocks[$bname];
} elseif ($this->_ignore_missing_blocks) {
// ------------------------------------------------------
// NW : 17 Oct 2002. Added default of ignore_missing_blocks
// to allow for generalised processing where some
// blocks may be removed from the HTML without the
// processing code needing to be altered.
// ------------------------------------------------------
// JRC: 3/1/2003 added set error to ignore missing functionality
$this->_set_error("parse: blockname [$bname] does not exist");
return;
} else {
$this->_set_error("parse: blockname [$bname] does not exist");
}
/* from there we should have no more {FILE } directives */
if (!isset($copy)) {
die('Block: ' . $bname);
}
$copy = preg_replace($this->filevar_delim_nl, '', $copy);
$var_array = array();
/* find & replace variables+blocks */
preg_match_all("|" . $this->tag_start_delim . "([A-Za-z0-9\._]+?" . $this->comment_preg . ")" . $this->tag_end_delim. "|", $copy, $var_array);
$var_array = $var_array[1];
foreach ($var_array as $k => $v) {
// Are there any comments in the tags {tag#a comment for documenting the template}
$any_comments = explode('#', $v);
$v = rtrim($any_comments[0]);
if (sizeof($any_comments) > 1) {
$comments = $any_comments[1];
} else {
$comments = '';
}
$sub = explode('.', $v);
if ($sub[0] == '_BLOCK_') {
unset($sub[0]);
$bname2 = implode('.', $sub);
// trinary operator eliminates assign error in E_ALL reporting
$var = isset($this->parsed_blocks[$bname2]) ? $this->parsed_blocks[$bname2] : null;
$nul = (!isset($this->_null_block[$bname2])) ? $this->_null_block[''] : $this->_null_block[$bname2];
if ($var === '') {
if ($nul == '') {
// -----------------------------------------------------------
// Removed requirement for blocks to be at the start of string
// -----------------------------------------------------------
// $copy=preg_replace("/^\s*\{".$v."\}\s*\n*/m","",$copy);
// Now blocks don't need to be at the beginning of a line,
//$copy=preg_replace("/\s*" . $this->tag_start_delim . $v . $this->tag_end_delim . "\s*\n*/m","",$copy);
$copy = preg_replace("|" . $this->tag_start_delim . $v . $this->tag_end_delim . "|m", '', $copy);
} else {
$copy = preg_replace("|" . $this->tag_start_delim . $v . $this->tag_end_delim . "|m", "$nul", $copy);
}
} else {
//$var = trim($var);
switch (true) {
case preg_match('/^\n/', $var) && preg_match('/\n$/', $var):
$var = substr($var, 1, -1);
break;
case preg_match('/^\n/', $var):
$var = substr($var, 1);
break;
case preg_match('/\n$/', $var):
$var = substr($var, 0, -1);
break;
}
// SF Bug no. 810773 - thanks anonymous
$var = str_replace('\\', '\\\\', $var);
// Ensure dollars in strings are not evaluated reported by SadGeezer 31/3/04
$var = str_replace('$', '\\$', $var);
// Replaced str_replaces with preg_quote
//$var = preg_quote($var);
$var = str_replace('\\|', '|', $var);
$copy = preg_replace("|" . $this->tag_start_delim . $v . $this->tag_end_delim . "|m", "$var", $copy);
if (preg_match('/^\n/', $copy) && preg_match('/\n$/', $copy)) {
$copy = substr($copy, 1, -1);
}
}
} else {
$var = $this->vars;
foreach ($sub as $v1) {
// NW 4 Oct 2002 - Added isset and is_array check to avoid NOTICE messages
// JC 17 Oct 2002 - Changed EMPTY to stlen=0
// if (empty($var[$v1])) { // this line would think that zeros(0) were empty - which is not true
if (!isset($var[$v1]) || (!is_array($var[$v1]) && strlen($var[$v1]) == 0)) {
// Check for constant, when variable not assigned
if (defined($v1)) {
$var[$v1] = constant($v1);
} else {
$var[$v1] = null;
}
}
$var = $var[$v1];
}
$nul = (!isset($this->_null_string[$v])) ? ($this->_null_string[""]) : ($this->_null_string[$v]);
$var = (!isset($var)) ? $nul : $var;
if ($var === '') {
// -----------------------------------------------------------
// Removed requriement for blocks to be at the start of string
// -----------------------------------------------------------
// $copy=preg_replace("|^\s*\{".$v." ?#?".$comments."\}\s*\n|m","",$copy);
$copy = preg_replace("|" . $this->tag_start_delim . $v . "( ?#" . $comments . ")?" . $this->tag_end_delim . "|m", '', $copy);
}
$var = trim($var);
// SF Bug no. 810773 - thanks anonymous
$var = str_replace('\\', '\\\\', $var);
// Ensure dollars in strings are not evaluated reported by SadGeezer 31/3/04
$var = str_replace('$', '\\$', $var);
// Replace str_replaces with preg_quote
//$var = preg_quote($var);
$var = str_replace('\\|', '|', $var);
$copy = preg_replace("|" . $this->tag_start_delim . $v . "( ?#" . $comments . ")?" . $this->tag_end_delim . "|m", "$var", $copy);
if (preg_match('/^\n/', $copy) && preg_match('/\n$/', $copy)) {
$copy = substr($copy, 1);
}
}
}
if (isset($this->parsed_blocks[$bname])) {
$this->parsed_blocks[$bname] .= $copy;
} else {
$this->parsed_blocks[$bname] = $copy;
}
/* reset sub-blocks */
if ($this->_autoreset && (!empty($this->sub_blocks[$bname]))) {
reset($this->sub_blocks[$bname]);
foreach ($this->sub_blocks[$bname] as $k => $v) {
$this->reset($v);
}
}
}
/**
* returns the parsed text for a block, including all sub-blocks.
*
* @access public
* @param string $bname Block name to parse
*/
public function rparse ($bname) {
if (!empty($this->sub_blocks[$bname])) {
reset($this->sub_blocks[$bname]);
foreach ($this->sub_blocks[$bname] as $k => $v) {
if (!empty($v)) {
$this->rparse($v);
}
}
}
$this->parse($bname);
}
/**
* inserts a loop ( call assign & parse )
*
* @access public
* @param string $bname Block name to assign
* @param string $var Variable to assign values to
* @param string / array $value Value to assign to $var
*/
public function insert_loop ($bname, $var, $value = '') {
$this->assign($var, $value);
$this->parse($bname);
}
/**
* parses a block for every set of data in the values array
*
* @access public
* @param string $bname Block name to loop
* @param string $var Variable to assign values to
* @param array $values Values to assign to $var
*/
public function array_loop ($bname, $var, &$values) {
if (is_array($values)) {
foreach($values as $v) {
$this->insert_loop($bname, $var, $v);
}
}
}
/**
* returns the parsed text for a block
*
* @access public
* @param string $bname Block name to return
* @return string
*/
public function text ($bname = '') {
$text = '';
if ($this->debug && $this->output_type == 'HTML') {
// JC 20/11/02 echo the template filename if in development as
// html comment
$text .= '<!-- XTemplate: ' . realpath($this->filename) . " -->\n";
}
$bname = !empty($bname) ? $bname : $this->mainblock;
$text .= isset($this->parsed_blocks[$bname]) ? $this->parsed_blocks[$bname] : $this->get_error();
return $text;
}
/**
* prints the parsed text
*
* @access public
* @param string $bname Block name to echo out
*/
public function out ($bname) {
$out = $this->text($bname);
// $length=strlen($out);
//header("Content-Length: ".$length); // TODO: Comment this back in later
echo $out;
}
/**
* prints the parsed text to a specified file
*
* @access public
* @param string $bname Block name to write out
* @param string $fname File name to write to
*/
public function out_file ($bname, $fname) {
if (!empty($bname) && !empty($fname) && is_writeable($fname)) {
$fp = fopen($fname, 'w');
fwrite($fp, $this->text($bname));
fclose($fp);
}
}
/**
* resets the parsed text
*
* @access public
* @param string $bname Block to reset
*/
public function reset ($bname) {
$this->parsed_blocks[$bname] = '';
}
/**
* returns true if block was parsed, false if not
*
* @access public
* @param string $bname Block name to test
* @return boolean
*/
public function parsed ($bname) {
return (!empty($this->parsed_blocks[$bname]));
}
/**
* sets the string to replace in case the var was not assigned
*
* @access public
* @param string $str Display string for null block
* @param string $varname Variable name to apply $str to
*/
public function set_null_string($str, $varname = '') {
$this->_null_string[$varname] = $str;
}
/**
* Backwards compatibility only
*
* @param string $str
* @param string $varname
* @deprecated Change to set_null_string to keep in with rest of naming convention
*/
public function SetNullString ($str, $varname = '') {
$this->set_null_string($str, $varname);
}
/**
* sets the string to replace in case the block was not parsed
*
* @access public
* @param string $str Display string for null block
* @param string $bname Block name to apply $str to
*/
public function set_null_block ($str, $bname = '') {
$this->_null_block[$bname] = $str;
}
/**
* Backwards compatibility only
*
* @param string $str
* @param string $bname
* @deprecated Change to set_null_block to keep in with rest of naming convention
*/
public function SetNullBlock ($str, $bname = '') {
$this->set_null_block($str, $bname);
}
/**
* sets AUTORESET to 1. (default is 1)
* if set to 1, parse() automatically resets the parsed blocks' sub blocks
* (for multiple level blocks)
*
* @access public
*/
public function set_autoreset () {
$this->_autoreset = true;
}
/**
* sets AUTORESET to 0. (default is 1)
* if set to 1, parse() automatically resets the parsed blocks' sub blocks
* (for multiple level blocks)
*
* @access public
*/
public function clear_autoreset () {
$this->_autoreset = false;
}
/**
* scans global variables and assigns to PHP array
*
* @access public
*/
public function scan_globals () {
reset($GLOBALS);
foreach ($GLOBALS as $k => $v) {
$GLOB[$k] = $v;
}
/**
* Access global variables as:
* @example {PHP._SERVER.HTTP_HOST}
* in your template!
*/
$this->assign('PHP', $GLOB);
}
/**
* gets error condition / string
*
* @access public
* @return boolean / string
*/
public function get_error () {
// JRC: 3/1/2003 Added ouptut wrapper and detection of output type for error message output
$retval = false;
if ($this->_error != '') {
switch ($this->output_type) {
case 'HTML':
case 'html':
$retval = '<b>[XTemplate]</b><ul>' . nl2br(str_replace('* ', '<li>', str_replace(" *\n", "</li>\n", $this->_error))) . '</ul>';
break;
default:
$retval = '[XTemplate] ' . str_replace(' *\n', "\n", $this->_error);
break;
}
}
return $retval;
}
/***************************************************************************/
/***[ private stuff ]*******************************************************/
/***************************************************************************/
/**
* generates the array containing to-be-parsed stuff:
* $blocks["main"],$blocks["main.table"],$blocks["main.table.row"], etc.
* also builds the reverse parse order.
*
* @access public - aiming for private
* @param string $con content to be processed
* @param string $parentblock name of the parent block in the block hierarchy
*/
public function _maketree ($con, $parentblock='') {
$blocks = array();
$con2 = explode($this->block_start_delim, $con);
if (!empty($parentblock)) {
$block_names = explode('.', $parentblock);
$level = sizeof($block_names);
} else {
$block_names = array();
$level = 0;
}
// JRC 06/04/2005 Added block comments (on BEGIN or END) <!-- BEGIN: block_name#Comments placed here -->
//$patt = "($this->block_start_word|$this->block_end_word)\s*(\w+)\s*$this->block_end_delim(.*)";
$patt = "(" . $this->block_start_word . "|" . $this->block_end_word . ")\s*(\w+)" . $this->comment_preg . "\s*" . $this->block_end_delim . "(.*)";
foreach($con2 as $k => $v) {
$res = array();
if (preg_match_all("/$patt/ims", $v, $res, PREG_SET_ORDER)) {
// $res[0][1] = BEGIN or END
// $res[0][2] = block name
// $res[0][3] = comment
// $res[0][4] = kinda content
$block_word = $res[0][1];
$block_name = $res[0][2];
$comment = $res[0][3];
$content = $res[0][4];
if (strtoupper($block_word) == $this->block_start_word) {