PHP过滤黑名单关键字的方法
本文实例讲述了PHP过滤黑名单关键字的方法。分享给大家供大家参考。具体实现方法如下：
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.
实例代码如下:
复制代码 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 $data;
}
}
function check_($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:
复制代码 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;
}
$content = "<a href='#'>我要aaafsdfbbb</a>";
if ($result = Filter_word($content, './words.txt') ){
echo $result;
echo "替换成功 ";
}else{
echo "替换失败! ";
?>
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! ";
?>
希望本文所述对大家的PHP程序设计有所帮助。