PHP删除当前目录下统计代码块

<?php /****  删除文件中百度统计代码**/new delTJ();class delTJ  {private $dir = '.';    //文件存放的目录private $dirHandler;public function __construct() {$this->del();}private function del() {if(is_dir($this->dir)){echo '找到文件目录！';$this->dirHandler = opendir($this->dir);if($this->dirHandler){while (false !== ($file = readdir($this->dirHandler)) ) {if($file !== '.' && $file !== '..'){$filename = dirname(__FILE__).DIRECTORY_SEPARATOR.$file;echo $filename;$content = file_get_contents(dirname(__FILE__).DIRECTORY_SEPARATOR.$file);$content = preg_replace('/<!--mytest.com(.*)\n(.*)\n(.*)\n(.*)\n(.*)<\/script>/', '', $content);file_put_contents($filename,$content);}}}}}} ?>