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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of Twig.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (c) 2009 Fabien Potencier  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * For the full copyright and license information, please view the LICENSE  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * file that was distributed with this source code.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Henrik Bjornskov <[email protected]>  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                class Twig_Extensions_Extension_Text extends Twig_Extension  | 
            
                            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * Returns a list of filters.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return array  | 
            
                            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getFilters ()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            new Twig_SimpleFilter('summary',  'twig_summary_filter'), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            new Twig_SimpleFilter('truncate', 'twig_truncate_filter', array('needs_environment' => true)), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            new Twig_SimpleFilter('wordwrap', 'twig_wordwrap_filter', array('needs_environment' => true)), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * Name of this extension.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getName ()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return 'Text';  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                function twig_summary_filter ($value, $paragraphCount = 1)  | 
            
                            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    if (function_exists('simplexml_load_string')) | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $content = simplexml_load_string('<html>' . $value . '</html>'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $count = min($paragraphCount, $content->count());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $children = $content->children();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $summary = "";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        for ($i = 0; $i < $count; $i++)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $summary .= $children[$i]->asXml();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $summary;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return $value;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                function twig_truncate_filter (Twig_Environment $env, $value, $length = 30, $preserve = false, $separator = '...')  | 
            
                            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    if (mb_strlen($value, $env->getCharset()) > $length)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($preserve)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            // If breakpoint is on the last word, return the value without separator.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (false === ($breakpoint = mb_strpos($value, ' ', $length, $env->getCharset())))  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                return $value;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $length = $breakpoint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return rtrim(mb_substr($value, 0, $length, $env->getCharset())).$separator;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return $value;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                function twig_wordwrap_filter (Twig_Environment $env, $value, $length = 80, $separator = "\n", $preserve = false)  | 
            
                            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $sentences = array();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $previous = mb_regex_encoding();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    mb_regex_encoding($env->getCharset());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    $pieces = mb_split($separator, $value);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    mb_regex_encoding($previous);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    foreach ($pieces as $piece)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        while (!$preserve && mb_strlen($piece, $env->getCharset()) > $length)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $sentences[] = mb_substr($piece, 0, $length, $env->getCharset());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $piece = mb_substr($piece, $length, 2048, $env->getCharset());  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $sentences[] = $piece;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    return implode($separator, $sentences);  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.