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PHP防止SQL注入攻击和XSS攻击

程序员文章站 2022-03-14 10:02:13
代码如下: ......

代码如下:

/**
 * 防sql注入和xss攻击
 * @param $arr
 */
function safefilter (&$arr)
{

   $ra=array('/([\x00-\x08,\x0b-\x0c,\x0e-\x19])/','/script/','/javascript/','/vbscript/','/expression/','/applet/','/meta/','/xml/','/blink/','/link/','/style/','/embed/','/object/','/frame/','/layer/','/title/','/bgsound/','/base/','/onload/','/onunload/','/onchange/','/onsubmit/','/onreset/','/onselect/','/onblur/','/onfocus/','/onabort/','/onkeydown/','/onkeypress/','/onkeyup/','/onclick/','/ondblclick/','/onmousedown/','/onmousemove/','/onmouseout/','/onmouseover/','/onmouseup/','/onunload/');

   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(')、双引号(")、反斜线(\)与 nul(null 字符)加上反斜线转义
          }
          $value       = preg_replace($ra,'',$value);     //删除非打印字符,粗暴式过滤xss可疑字符串
          $arr[$key]     = htmlentities(strip_tags($value)); //去除 html 和 php 标记并转换为 html 实体
        }
        else
        {
          safefilter($arr[$key]);
        }
     }
   }
}