Implemented #128: Disable validation for heredoc and nowdoc in PHP code.

 - Added cutting heredoc and nowdoc in PHP files.

src/config/filters/HereNowdoc.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * @license https://raw.githubusercontent.com/andkirby/commithook/master/LICENSE.md
+ */
+-->
+<config>
+    <!--Hooks process setup-->
+    <hooks>
+        <pre-commit>
+            <filetype>
+                <php>
+                    <filters>
+                        <HereNowdoc>1</HereNowdoc>
+                    </filters>
+                </php>
+            </filetype>
+        </pre-commit>
+    </hooks>
+</config>

src/lib/PreCommit/Filter/HereNowdoc.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * @license https://raw.githubusercontent.com/andkirby/commithook/master/LICENSE.md
+ */
+/**
+ * Created by PhpStorm.
+ * User: a.roslik
+ * Date: 11/2/16 002
+ * Time: 6:06 PM
+ */
+
+namespace PreCommit\Filter;
+
+/**
+ * Class HereNowdoc filter
+ *
+ * @package AndKirby\PreCommit\Filter
+ */
+class HereNowdoc
+{
+    /**
+     * Filter skipped code blocks
+     *
+     * @param string      $content
+     * @param string|null $file
+     * @return bool
+     */
+    public function filter($content, $file = null)
+    {
+        foreach ($this->findTextBlockTags($content) as $tag) {
+            $content = $this->cut($tag, $content);
+        }
+
+        return $content;
+    }
+
+    /**
+     * Cut text code block
+     *
+     * @param string $tag
+     * @param string $content
+     * @return string
+     */
+    protected function cut($tag, $content)
+    {
+        return preg_replace(
+            '/(=[ ]*)<<<[\'"]?'.$tag.'[\'"]?\r?\n(\r|\n|.)*?'.$tag.';/',
+            '$1\'\'; //replaced code because skipped validation',
+            $content
+        );
+    }
+
+    /**
+     * Find text block tags
+     *
+     * @param string $content
+     * @return array
+     */
+    protected function findTextBlockTags($content)
+    {
+        //find blocks
+        preg_match_all('/=[ ]*<<<[\'"]?([A-z0-9]+)[\'"]?\r?\n/', $content, $matches);
+
+        return empty($matches[1]) ? [] : array_unique($matches[1]);
+    }
+}