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php过滤危险html代码函数分享

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Release: 2016-06-20 13:03:20
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用PHP过滤html里可能被利用来引入外部危险内容的代码。有些时候,需要让用户提交html内容,以便丰富用户发布的信息,当然,有些可能造成显示页面布局混乱的代码也在过滤范围内。

#用户发布的html,过滤危险代码 
function filterHtml($str) 
{ 
$farr = array( 
"/\\s /", //过滤多余的空白 
"/]*?)>/isU", //过滤 <script>]*)on[a-zA-Z] \\s*=([^>]*>)/isU", //过滤javascript的on事件 

); 
$tarr = array( 
" ", 
"<\\\\1\\\\2\\\\3>", //如果要直接清除不安全的标签,这里可以留空 
"\\\\1\\\\2", 
); 

$str = preg_replace( $farr,$tarr,$str); 
return $str; 
}</script>
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