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php过滤不安全的html

Jun 13, 2016 am 10:11 AM
html php not safe external introduce use of filter

php过滤不安全的html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。


以下是引用片段:
#用户发布的html,过滤危险代码
function uh($str)
{
    $farr = array(
        "/\s+/",                                                                    
                       //过滤多余的空白
        "/]*?)>/isU",
  //过滤 <script></script> 以加入         "/(]*)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;
}

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