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                <?php  | 
            
                            
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                    2
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                    3
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                if (! function_exists('Markdown')) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    require_once('markdown_helper.php'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    6
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                define('MARKDOWNEXTRAEXTENDED_VERSION', "0.3"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    7
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                    8
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                function MarkdownExtended($text, $default_classes = array())  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    10
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                    $parser = new MarkdownExtraExtended_Parser($default_classes);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return $parser->transform($text);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    14
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                class MarkdownExtraExtended_Parser extends MarkdownExtra_Parser  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    # Tags that are always treated as block tags:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    18
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                    var $block_tags_re = 'figure|figcaption|p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    19
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                    20
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                    var $default_classes;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    22
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                    function __construct($default_classes = array())  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $default_classes = $default_classes;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    25
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                        $this->block_gamut += array(  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            "doFencedFigures" => 7,  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        parent::__construct();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    31
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    33
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                    function transform($text)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $text = parent::transform($text);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    36
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                        return $text;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    function doHardBreaks($text)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    40
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        # Do hard breaks:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        # EXTENDED: changed to allow breaks without two spaces and just one new line  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        # original code /* return preg_replace_callback('/ {2,}\n/', */ | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return preg_replace_callback(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    45
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                            '/ *\n/',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            array(&$this, '_doHardBreaks_callback'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    47
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                            $text  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    48
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    49
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    50
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                    51
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                    function doBlockQuotes($text)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    53
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                        $text = preg_replace_callback(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            '/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    55
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                			(?>^[ ]*>[ ]?  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    56
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                				(?:\((.+?)\))?  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    57
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                				[ ]*(.+\n(?:.+\n)*)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			)+  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    59
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                			/xm',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    60
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                            array(&$this, '_doBlockQuotes_callback'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    61
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                            $text  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    62
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    64
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                        return $text;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    65
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    function _doBlockQuotes_callback($matches)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $cite = $matches[1];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $bq   = '> ' . $matches[2];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        # trim one level of quoting - trim whitespace-only lines  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $bq = preg_replace('/^[ ]*>[ ]?|^[ ]+$/m', '', $bq); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $bq = $this->runBlockGamut($bq); # recurse  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    74
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                        $bq = preg_replace('/^/m', "  ", $bq); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        # These leading spaces cause problem with <pre> content,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        # so we need to fix that:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $bq = preg_replace_callback(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            '{(\s*<pre>.+?</pre>)}sx', | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            array(&$this, '_doBlockQuotes_callback2'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    81
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                            $bq  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    82
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    83
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                    84
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                        $res = "<blockquote";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $res .= empty($cite) ? ">" : " cite=\"$cite\">";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    86
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                        $res .= "\n$bq\n</blockquote>";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    87
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                        return "\n" . $this->hashBlock($res) . "\n\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    88
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    89
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                    function doFencedCodeBlocks($text)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    91
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    92
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                        $less_than_tab = $this->tab_width;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    93
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                    94
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                        $text = preg_replace_callback(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    95
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                            '{ | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    96
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                				(?:\n|\A)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    97
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                				# 1: Opening marker  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    99
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                					~{3,}|`{3,} # Marker: three tilde or more. | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    100
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                				)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    101
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                    102
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                				[ ]?(\w+)?(?:,[ ]?(\d+))?[ ]* \n # Whitespace and newline following marker.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    103
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                    104
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                				# 3: Content  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    105
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                				(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    106
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                					(?>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    107
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                						(?!\1 [ ]* \n)	# Not a closing marker.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    108
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                						.*\n+  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    109
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                					)+  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    110
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                				)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    111
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                    112
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                				# Closing marker.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    113
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                				\1 [ ]* \n  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    114
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                			}xm',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    115
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                            array(&$this, '_doFencedCodeBlocks_callback'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    116
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                            $text  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    117
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    118
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                    119
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                        return $text;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    120
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    121
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                    122
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                    function _doFencedCodeBlocks_callback($matches)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    123
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    124
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                        $codeblock = $matches[4];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    125
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                        $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    126
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                        $codeblock = preg_replace_callback(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    127
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                            '/^\n+/',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    128
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                            array(&$this, '_doFencedCodeBlocks_newlines'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    129
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                            $codeblock  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    130
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    131
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                        //$codeblock = "<pre><code>$codeblock</code></pre>";  | 
            
                            
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                    132
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                        //$cb = "<pre><code";  | 
            
                            
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                                                     | 
                
                 | 
                        $cb = empty($matches[3]) ? "<pre><code" : "<pre class=\"linenums:$matches[3]\"><code";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    134
                 | 
                                    
                                                     | 
                
                 | 
                        $cb .= empty($matches[2]) ? ">" : " class=\"language-$matches[2]\">";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    135
                 | 
                                    
                                                     | 
                
                 | 
                        $cb .= "$codeblock</code></pre>";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    136
                 | 
                                    
                                                     | 
                
                 | 
                        return "\n\n" . $this->hashBlock($cb) . "\n\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                    function doFencedFigures($text)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                        $text = preg_replace_callback(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                            '{ | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                			(?:\n|\A)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                			# 1: Opening marker  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                			(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                				={3,} # Marker: equal sign. | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    147
                 | 
                                    
                                                     | 
                
                 | 
                			)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    148
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    149
                 | 
                                    
                                                     | 
                
                 | 
                			[ ]?(?:\[([^\]]+)\])?[ ]* \n # Whitespace and newline following marker.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    150
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    151
                 | 
                                    
                                                     | 
                
                 | 
                			# 3: Content  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    152
                 | 
                                    
                                                     | 
                
                 | 
                			(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    153
                 | 
                                    
                                                     | 
                
                 | 
                				(?>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    154
                 | 
                                    
                                                     | 
                
                 | 
                					(?!\1 [ ]?(?:\[([^\]]+)\])?[ ]* \n)	# Not a closing marker.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    155
                 | 
                                    
                                                     | 
                
                 | 
                					.*\n+  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    156
                 | 
                                    
                                                     | 
                
                 | 
                				)+  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    157
                 | 
                                    
                                                     | 
                
                 | 
                			)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    158
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    159
                 | 
                                    
                                                     | 
                
                 | 
                			# Closing marker.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    160
                 | 
                                    
                                                     | 
                
                 | 
                			\1 [ ]?(?:\[([^\]]+)\])?[ ]* \n  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    161
                 | 
                                    
                                                     | 
                
                 | 
                		}xm',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    162
                 | 
                                    
                                                     | 
                
                 | 
                            array(&$this, '_doFencedFigures_callback'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    163
                 | 
                                    
                                                     | 
                
                 | 
                            $text  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    164
                 | 
                                    
                                                     | 
                
                 | 
                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    165
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    166
                 | 
                                    
                                                     | 
                
                 | 
                        return $text;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    167
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    168
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    169
                 | 
                                    
                                                     | 
                
                 | 
                    function _doFencedFigures_callback($matches)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    170
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    171
                 | 
                                    
                                                     | 
                
                 | 
                        # get figcaption  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    172
                 | 
                                    
                                                     | 
                
                 | 
                        $topcaption    = empty($matches[2]) ? null : $this->runBlockGamut($matches[2]);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    173
                 | 
                                    
                                                     | 
                
                 | 
                        $bottomcaption = empty($matches[5]) ? null : $this->runBlockGamut($matches[5]);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    174
                 | 
                                    
                                                     | 
                
                 | 
                        $figure        = $matches[3];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    175
                 | 
                                    
                                                     | 
                
                 | 
                        $figure        = $this->runBlockGamut($figure); # recurse  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    176
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    177
                 | 
                                    
                                                     | 
                
                 | 
                        $figure = preg_replace('/^/m', "  ", $figure); | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    178
                 | 
                                    
                                                     | 
                
                 | 
                        # These leading spaces cause problem with <pre> content,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    179
                 | 
                                    
                                                     | 
                
                 | 
                        # so we need to fix that - reuse blockqoute code to handle this:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    180
                 | 
                                    
                                                     | 
                
                 | 
                        $figure = preg_replace_callback(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    181
                 | 
                                    
                                                     | 
                
                 | 
                            '{(\s*<pre>.+?</pre>)}sx', | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    182
                 | 
                                    
                                                     | 
                
                 | 
                            array(&$this, '_doBlockQuotes_callback2'),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    183
                 | 
                                    
                                                     | 
                
                 | 
                            $figure  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    184
                 | 
                                    
                                                     | 
                
                 | 
                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    185
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    186
                 | 
                                    
                                                     | 
                
                 | 
                        $res = "<figure>";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    187
                 | 
                                    
                                                     | 
                
                 | 
                        if (!empty($topcaption)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    188
                 | 
                                    
                                                     | 
                
                 | 
                            $res .= "\n<figcaption>$topcaption</figcaption>";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    189
                 | 
                                    
                                                     | 
                
                 | 
                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    190
                 | 
                                    
                                                     | 
                
                 | 
                        $res .= "\n$figure\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    191
                 | 
                                    
                                                     | 
                
                 | 
                        if (!empty($bottomcaption) && empty($topcaption)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    192
                 | 
                                    
                                                     | 
                
                 | 
                            $res .= "<figcaption>$bottomcaption</figcaption>";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    193
                 | 
                                    
                                                     | 
                
                 | 
                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    194
                 | 
                                    
                                                     | 
                
                 | 
                        $res .= "</figure>";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    195
                 | 
                                    
                                                     | 
                
                 | 
                        return "\n" . $this->hashBlock($res) . "\n\n";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    196
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    197
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    198
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    199
                 | 
                                    
                                                     | 
                
                 | 
                ?>  | 
            
            
                                                        
            
                                    
            
            
                | 
                    200
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.