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php中过滤html代码的函数 提高程序安全性_PHP

WBOY
WBOYOriginal
2016-06-01 12:20:43822browse

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。

以下为过滤HTML代码的函数:

 

function ihtmlspecialchars($string) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = ihtmlspecialchars($val);
}
} else {
$string = preg_replace('/&((#(\d{3,5}|x[a-fA-F0-9]{4})|[a-zA-Z][a-z0-9]{2,5});)/', '&\\1',
str_replace(array('&', '"', ''), array('&', '"', '<', '>'), $string));
}
return $string;
}

 

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