PHP filter Sensitive Word instance code

<?php


  /** 


* Created by JetBrains phpstorm.


* USER:LSL


* date:13-8-28


* Time: Afternoon 2:58


* Sensitive word Filter tool class


* Use method


* echo filtertools::filtercontent (&quot; your mother i fuck color wolf hybrid two mountain food &quot;,&quot;*&quot;,dir.&quot ; config/word.txt&quot; $GLOBALS [&quot;p_memcache&quot;] [&quot;bad_words&quot;]);


   */ 


   


class Filtertools {


Public static $keyword = Array ();


      /** 


* Load sensitive words from a file


* @param $filename


* @return Array


       */ 


static function Getbadwords ($filename) {


$file _handle = fopen ($filename, &quot;r&quot;);


while (!feof ($file _handle)) {


$line = Trim (fgets ($file _handle));


Array_push (self:: $keyword, $line);


          } 


fclose ($file _handle);


return self:: $keyword;


      } 


   


      /** 


* @param $content to be processed string


* @param $target replaced character


* @param $filename Sensitive word configuration file


* @param $memconfig cache configuration file


* @return The processed string


       */ 


static function Filtercontent ($content, $target, $filename, $memconfig) {


$mem = new Badwordsmemcache ($filename, $memconfig);


$keyword = $mem-&gt;getlist ();


if (count ($keyword) = 0) {


$keyword = self::getbadwords ($filename);


          } 


return strtr ($content, Array_combine ($keyword, Array_fill (0,count ($keyword), $target ));


      } 


   


  } 


   


  /** 


* Sensitive word Cache processing class


* Class badwordsmemcache


* USER:LSL


   */ 


class badwordsmemcache{


var $memcache;


var $key;


var $list;


var $filename;


function __construct ($filename, $memconfig) {


$this-&gt;filename = $filename;


if (!class_exists &quot; p_memcache&quot;)) {


require_once dir.&quot;lib/memcache.class.php&quot;;


          } 


$this-&gt;key = &quot;bad_words&quot;;


$this-&gt;memcache = new P_memcache ();


$this-&gt;memcache-&gt;config = $memconfig;


$this-&gt;memcache-&gt;connect ();


Print_r ($this-&gt;memcache);


$this-&gt;init ();


      } 


function __destruct () {


$this-&gt;memcache-&gt;close ();


      } 


   


      /** 


* Initialization


* @param bool $isReset


       */ 


function init ($isReset = False) {


$this-&gt;list = $this-&gt;memcache-&gt;get ($this-&gt;key)? $this-&gt;memcache-&gt;ge T ($this-&gt;key): Array ();


if (count ($this-&gt;list) ==0 | | $isReset) {


$this-&gt;list = filtertools::getbadwords ($this-&gt;filename);


$this-&gt;memcache-&gt;set ($this-&gt;key, $this-&gt;list);


$log _data = log::formatdata ($this-&gt;list);


Log::logwrite ($log _data, ' bad.words ', ' init ');


          } 


      } 


   


      /** 


* Get list


* @return Mixed


       */ 


function GetList () {


return $this-&gt;list;


      } 


  }