PHP filter Sensitive words

<?php /**   * 敏感词过滤工具类   * 使用方法   * echo FilterTools::filterContent("你妈的我操一色狼杂种二山食物","*",DIR."config/word.txt",$GLOBALS["p_memcache"]["bad_words"]);   */ class FilterTools {      public static $keyword = array ();      /**       * 从文件中加载敏感词       * @param $filename       * @return array       */      static function getBadWords( $filename ){          $file_handle = fopen ( $filename , "r" );          while (! feof ( $file_handle )) {              $line = trim( fgets ( $file_handle ));              array_push (self:: $keyword , $line );          }          fclose( $file_handle );          return self:: $keyword ;      }      /**       * @param $content 待处理字符串       * @param $target  替换后的字符       * @param $filename  敏感词配置文件       * @param $memconfig 缓存配置文件       * @return 处理后的字符串       */      static function filterContent( $content , $target , $filename , $memconfig ){          $mem = new BadWordsMemcache( $filename , $memconfig );          $keyword = $mem ->getList();          if ( count ( $keyword ) == 0){              $keyword = self::getBadWords( $filename );          }          return strtr ( $content , array_combine ( $keyword , array_fill (0, count ( $keyword ), $target )));      } } /**   * 敏感词缓存处理类   * Class BadWordsMemcache   */ class BadWordsMemcache{      var $memcache ;      var $key ;      var $list ;      var $filename ;      function __construct( $filename , $memconfig ) {          $this ->filename = $filename ;          if (! class_exists ( "P_Memcache" )){              require_once DIR. "lib/memcache.class.php" ;          }          $this ->key = "bad_words" ;          $this ->memcache = new P_Memcache();          $this ->memcache->config = $memconfig ;          $this ->memcache->connect();          print_r( $this ->memcache);          $this ->init();      }      function __destruct() {          $this ->memcache->close();      }      /**       * 初始化       * @param bool $isReset       */      function init( $isReset = false){          $this ->list = $this ->memcache->get( $this ->key)? $this ->memcache->get( $this ->key): array ();          if ( count ( $this ->list)==0 || $isReset ){              $this ->list = filterTools::getBadWords( $this ->filename);              $this ->memcache->set( $this ->key, $this ->list);              $log_data = Log::formatData( $this ->list);              Log::logWrite( $log_data , ‘bad.words‘ , ‘init‘ );          }      }      /**       * 获取列表       * @return mixed       */      function getList(){          return $this ->list;      } }

PHP filter Sensitive words