PHP过滤黑名单关键字的例子

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(&#39;file read error!&#39;);    
    }    
    $str = strtolower($str); 
    //var_dump($words); 
    $word = preg_replace("/[1,2,3] | /i", &#39;&#39;, $words); 
    //$wor = substr($word,0,-1); 
    //$w = preg_replace("|/|i", &#39;/&#39;, $word); 
    //echo "<pre class="brush:php;toolbar:false">"; 
    //var_dump($w); 
    //$words = "aaa|bbb|ccc|ddd|eee"; 
        $matched = preg_replace(&#39;/&#39;.$word.&#39;/i&#39;, &#39;***&#39;, $string); 
    return $matched; //开源代码phprm.com 
}    
   
$content = "<a href=&#39;#&#39;>我要aaafsdfbbb</a>";    
if ($result = Filter_word($content, &#39;./words.txt&#39;) ){ 
echo $result; 
    echo "替换成功 ";    
}else{    
    echo "替换失败! ";  
}

教程链接:

随意转载~但请保留教程地址★