//过滤黑名单关键字函数 function check_($data){  $keywords = "你是大神吗|你好|去死";  if(preg_match("/$keywords/i",$data)){   return;  }else{   return $data;  } }

<?php function Filter_word( $str, $fileName )    {        if ( !($words = file_get_contents( $fileName )) ){            die('file read error!');        }        $str = strtolower($str); //var_dump($words); $word = preg_replace("/[1,2,3] | /i", '', $words); //$wor = substr($word,0,-1); //$w = preg_replace("|/|i", '/', $word); //echo "<pre>"; //var_dump($w); //$words = "aaa|bbb|ccc|ddd|eee";     $matched = preg_replace('/'.$word.'/i', '***', $string); return $matched; }       $content = "<a href='#'>我要aaafsdfbbb</a>";    if ($result = Filter_word($content, './words.txt') ){ echo $result;     echo "替换成功 ";    }else{        echo "替换失败! "; ?>