过滤部分标签

delTags.php

<?php
function delTags($str)  
{  
    $farr = array(  
    "/<(\/?)(script|i?frame|style|html|body|title|link|meta|form|input|embed|object|textarea|\?|\%)([^>]*?)>/isU",  
    "/(<[^>]*)on[a-zA-Z]+\s*=([^>]*>)/isU"  
    );  
    $tarr = array(  
    "",  
    ""  
    );  
    $str = preg_replace( $farr,$tarr,$str);  
    return $str;  
}  
  
$str = "<a href='#'>asdfasdfsd</a>====<script>alert(1111)</script>";  
echo delTags($str);    //结果：<a href='#'>asdfasdfsd</a>====alert(1111)  
echo strip_tags($str); //结果：sdfasdfsd====alert(1111)