PHP POST, GET 参数过滤，预防sql注入函数

 1 static public function filterWords(&$str)
 2     {
 3         $farr = array(
 4             "/<(\\/?)(script|i?frame|style|html|body|title|link|meta|object|\\?|\\%)([^>]*?)>/isU",
 5             "/(<[^>]*)on[a-zA-Z]+\s*=([^>]*>)/isU",
 6             "/select\b|insert\b|update\b|delete\b|drop\b|;|\"|\‘|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile|dump/is"
 7         );
 8         $str = preg_replace($farr,‘‘,$str);
 9         $str = strip_tags($str);
10         return $str;
11     }

static function filterParams(&$params, $tmp = array())
    {
        if(is_array($params)){
            foreach($params as $k => &$v){
                if(is_array($v))
                {
                    self::filterParams($v);
                }else{
                    self::filterWords($v);

                }
            }
        }
        else
        {
            $arr[] = self::filterWords($params);
        }
        return $params;
    }

 1 static  function filterKeys($arr, $subKey, &$myArr)
 2     {
 3         foreach($arr as $k=>$v)
 4         {
 5             if(is_array($v))
 6             {
 7                 $filterKey = self::filterWords($k);
 8                 self::filterKeys($v, $filterKey, $myArr);
 9 
10             }else{
11                 $filterKey = self::filterWords($k);
12                 if($subKey != ‘‘)
13                 {
14                     $myArr[$subKey][$filterKey] = $v;
15                 }else{
16                     $myArr[$filterKey] = $v;
17                 }
18             }
19         }
20 
21     }