Support PHP 5.4 and 5.5

Fix #33

composer.json

@@ -20,13 +20,14 @@
     }
   ],
   "require": {
-    "php": ">=5.6"
+    "php": ">=5.4"
   },
   "require-dev": {
     "phpunit/phpunit": "^4.8.24",
     "phpmd/phpmd": "~2.4",
     "squizlabs/php_codesniffer": "~2.6",
-    "apigen/apigen": "~4.1"
+    "apigen/apigen": "~4.1",
+    "indigophp/hash-compat": "~1.1.0"
   },
   "autoload": {
     "psr-4": {

src/LINEBot.php

@@ -24,6 +24,7 @@
 use LINE\LINEBot\MessageBuilder\TextMessageBuilder;
 use LINE\LINEBot\Response;
 use LINE\LINEBot\SignatureValidator;
+use ReflectionClass;
 
 /**
  * A client class of LINE Messaging API.
@@ -100,14 +101,27 @@ public function replyMessage($replyToken, MessageBuilder $messageBuilder)
      *
      * This method receives variable texts. It can send text(s) message as bulk.
      *
+     * Exact signature of this method is <code>replyText(string $replyToken, string $text, string[] $extraTexts)</code>.
+     *
+     * Means, this method can also receive multiple texts like so;
+     *
+     * <code>
+     * $bot->replyText('reply-text', 'text', 'extra text1', 'extra text2', ...)
+     * </code>
+     *
      * @param string $replyToken Identifier of destination.
      * @param string $text Text of message.
-     * @param string[] $extraTexts Extra text of message.
      * @return Response
      */
-    public function replyText($replyToken, $text, ...$extraTexts)
+    public function replyText($replyToken, $text)
     {
-        $textMessageBuilder = new TextMessageBuilder($text, ...$extraTexts);
+        $args = func_get_args();
+        $extraTexts = array_slice($args, 2);
+
+        /** @var TextMessageBuilder $textMessageBuilder */
+        $ref = new ReflectionClass('LINE\LINEBot\MessageBuilder\TextMessageBuilder');
+        $textMessageBuilder = $ref->newInstanceArgs(array_merge([$text], $extraTexts));
+
         return $this->replyMessage($replyToken, $textMessageBuilder);
     }
 

src/LINEBot/HTTPClient/CurlHTTPClient.php

@@ -35,7 +35,7 @@ class CurlHTTPClient implements HTTPClient
     /** @var array */
     private $authHeaders;
     /** @var array */
-    private $userAgentHeader = ['User-Agent: LINE-BotSDK-PHP/' . Meta::VERSION];
+    private $userAgentHeader;
 
     /**
      * CurlHTTPClient constructor.
@@ -47,6 +47,9 @@ public function __construct($channelToken)
         $this->authHeaders = [
             "Authorization: Bearer $channelToken",
         ];
+        $this->userAgentHeader = [
+            'User-Agent: LINE-BotSDK-PHP/' . Meta::VERSION,
+        ];
     }
 
     /**

src/LINEBot/MessageBuilder/TextMessageBuilder.php

@@ -36,11 +36,20 @@ class TextMessageBuilder implements MessageBuilder
     /**
      * TextMessageBuilder constructor.
      *
+     * Exact signature of this constructor is <code>new TextMessageBuilder(string $text, string[] $extraTexts)</code>.
+     *
+     * Means, this constructor can also receive multiple messages like so;
+     *
+     * <code>
+     * $textBuilder = new TextMessageBuilder('text', 'extra text1', 'extra text2', ...);
+     * </code>
+     *
      * @param string $text
-     * @param string[] $extraTexts
      */
-    public function __construct($text, ...$extraTexts)
+    public function __construct($text)
     {
+        $args = func_get_args();
+        $extraTexts = array_slice($args, 1);
         $this->texts = array_merge([$text], $extraTexts);
     }
 

tests/LINEBot/HTTPClient/CurlHTTPClientTest.php

@@ -23,12 +23,14 @@
 
 class CurlHTTPClientTest extends \PHPUnit_Framework_TestCase
 {
-    private static $reqMirrorPath = __DIR__ . '/../../../devtool/req_mirror';
+    private static $reqMirrorPath;
     private static $reqMirrorPort;
     private static $reqMirrorPID;
 
     public static function setUpBeforeClass()
     {
+        CurlHTTPClientTest::$reqMirrorPath = __DIR__ . '/../../../devtool/req_mirror';
+
         if (file_exists(CurlHTTPClientTest::$reqMirrorPath)) {
             if (empty(CurlHTTPClientTest::$reqMirrorPort)) {
                 $sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);