关键字过滤非常的简单把要过滤的内容存在数组或文档中,然后用户提交时我们进行preg_match或istrpos判断即可解决了,具体方法如下.

例,代码如下:

//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; 
 }  
} 

关键字的存放形式为txt,txt文件中以这样形式存放:|赌博机|卖血|出售肾|出售器官|眼角膜,代码如下:

<?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; //开源代码phpfensi.com 
}    
   
$content = "<a href='#'>我要aaafsdfbbb</a>";    
if ($result = Filter_word($content, './words.txt') ){ 
echo $result; 
    echo "替换成功 ";    
}else{    
    echo "替换失败! "; 
?>