PHP filter sensitive word example code_PHP tutorial

  /**
* Created by JetBrains PhpStorm.
* User: lsl
* Date: 13-8-28
* Time: 2:58 PM
* Sensitive word filtering tools
* How to use
* echo FilterTools::filterContent("Fuck you, I’m a pervert bastard Ershan Food","*",DIR."config/word.txt",$GLOBALS["p_memcache" ]["bad_words"]);
*/ 
   
  class FilterTools { 
      public static $keyword = array(); 
      /**
* Load sensitive words from the file
* @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 
   * User: lsl 
   */ 
  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; 
      } 
  } 

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