File lass/textsanitizer/syntaxhighlight/syntaxhighlight.php

 1: <?php
 2: /**
 3:  * TextSanitizer extension
 4:  *
 5:  * You may not change or alter any portion of this comment or credits
 6:  * of supporting developers from this source code or any supporting source code
 7:  * which is considered copyrighted (c) material of the original comment or credit authors.
 8:  * This program is distributed in the hope that it will be useful,
 9:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11:  *
12:  * @copyright       (c) 2000-2016 XOOPS Project (www.xoops.org)
13:  * @license             GNU GPL 2 (http://www.gnu.org/licenses/gpl-2.0.html)
14:  * @package             class
15:  * @subpackage          textsanitizer
16:  * @since               2.3.0
17:  * @author              Taiwen Jiang <phppp@users.sourceforge.net>
18:  */
19: defined('XOOPS_ROOT_PATH') || exit('Restricted access');
20: 
21: /**
22:  * Class MytsSyntaxhighlight
23:  */
24: class MytsSyntaxhighlight extends MyTextSanitizerExtension
25: {
26:     /**
27:      * @param $ts
28:      * @param $source
29:      * @param $language
30:      *
31:      * @return bool|mixed|string
32:      */
33:     public function load($ts, $source, $language)
34:     {
35:         $config = parent::loadConfig(__DIR__);
36:         if (empty($config['highlight'])) {
37:             return "<pre>{$source}</pre>";
38:         }
39:         $source = $ts->undoHtmlSpecialChars($source);
40:         $source = stripslashes($source);
41:         $source = MytsSyntaxhighlight::php($source);
42: 
43:         return $source;
44:     }
45: 
46:     /**
47:      * @param $text
48:      *
49:      * @return mixed|string
50:      */
51:     public function php($text)
52:     {
53:         $text          = trim($text);
54:         $addedtag_open = 0;
55:         if (!strpos($text, '<?php') && (substr($text, 0, 5) !== '<?php')) {
56:             $text          = '<?php ' . $text;
57:             $addedtag_open = 1;
58:         }
59:         $addedtag_close = 0;
60:         if (!strpos($text, '?>')) {
61:             $text .= '?>';
62:             $addedtag_close = 1;
63:         }
64:         $oldlevel = error_reporting(0);
65: 
66:         //There is a bug in the highlight function(php < 5.3) that it doesn't render
67:         //backslashes properly like in \s. So here we replace any backslashes
68:         $text = str_replace("\\", 'XxxX', $text);
69: 
70:         $buffer = highlight_string($text, true); // Require PHP 4.20+
71: 
72:         //Placing backspaces back again
73:         $buffer = str_replace('XxxX', "\\", $buffer);
74: 
75:         error_reporting($oldlevel);
76:         $pos_open = $pos_close = 0;
77:         if ($addedtag_open) {
78:             $pos_open = strpos($buffer, '&lt;?php&nbsp;');
79:         }
80:         if ($addedtag_close) {
81:             $pos_close = strrpos($buffer, '?&gt;');
82:         }
83: 
84:         $str_open  = $addedtag_open ? substr($buffer, 0, $pos_open) : '';
85:         $str_close = $pos_close ? substr($buffer, $pos_close + 5) : '';
86: 
87:         $length_open  = $addedtag_open ? $pos_open + 14 : 0;
88:         $length_text  = $pos_close ? $pos_close - $length_open : 0;
89:         $str_internal = $length_text ? substr($buffer, $length_open, $length_text) : substr($buffer, $length_open);
90: 
91:         $buffer = $str_open . $str_internal . $str_close;
92: 
93:         return $buffer;
94:     }
95: }
96:
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