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php通用全局安全过滤xss & 防注入

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Release: 2016-05-23 16:40:20
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php代码

<?php
//php防注入和XSS攻击通用过滤.  
//by qq:831937
$_GET		&& SafeFilter($_GET);
$_POST		&& SafeFilter($_POST);
$_COOKIE	&& SafeFilter($_COOKIE);
 
function SafeFilter (&$arr) 
{   
      if (is_array($arr))
     {
          foreach ($arr as $key => $value) 
          {
               if (!is_array($value))
               {
                    if (!get_magic_quotes_gpc())	//不对magic_quotes_gpc转义过的字符使用addslashes(),避免双重转义。
                    {
                         $value    = addslashes($value);	//给单引号(&#39;)、双引号(")、反斜线(\)与 NUL(NULL 字符)加上反斜线转义
                    }
                    $arr[$key]         = htmlspecialchars($value,ENT_QUOTES);	//&,",&#39;,> ,< 转为html实体 &amp;,&quot;&#039;,&gt;,&lt;

               }
               else
               {
                    SafeFilter($arr[$key]);
               }
          }
     }
}
?>
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