PHP学院的中学生 2020-07-29 16:27:37 1301次浏览 3条回复 1 0 0
/*  防sql注入,xss攻击  (1)*/
function actionClean($str)
{
    $str=trim($str);
    $str=strip_tags($str);
    $str=stripslashes($str);
    $str=addslashes($str);
    $str=rawurldecode($str);
    $str=quotemeta($str);
    $str=htmlspecialchars($str);
    //去除特殊字符
    $str=preg_replace("/\/|\~|\!|\@|\#|\\$|\%|\^|\&|\*|\(|\)|\_|\+|\{|\}|\:|\<|\>|\?|\[|\]|\,|\.|\/|\;|\'|\`|\-|\=|\\\|\|/", "" , $str);
    $str=preg_replace("/\s/", "", $str);//去除空格、换行符、制表符
    return $str;
}


//防止sql注入。xss攻击(1)
public function actionFilterArr($arr)
{
    if(is_array($arr)){
        foreach($arr as $k => $v){
            $arr[$k] = $this->actionFilterWords($v);
        }
    }else{
        $arr = $this->actionFilterWords($arr);
    }
    return $arr;
}


//防止xss攻击
public function actionFilterWords($str)
{
    $farr = array(
        "/<(\\/?)(script|i?frame|style|html|body|title|link|meta|object|\\?|\\%)([^>]*?)>/isU",
        "/(<[^>]*)on[a-zA-Z]+\s*=([^>]*>)/isU",
        "/select|insert|update|delete|drop|\'|\/\*|\*|\+|\-|\"|\.\.\/|\.\/|union|into|load_file|outfile|dump/is"
    );
    $str = preg_replace($farr,'',$str);
    return $str;
}

//防止sql注入,xss攻击(2)
public function post_check($post) {
  if(!get_magic_quotes_gpc()) {
      foreach($post as $key=>$val){
         $post[$key]  = addslashes($val);
      }
    }
  foreach($post as $key=>$val){
    //把"_"过滤掉
    $post[$key] = str_replace("_", "\_", $val);
    //把"%"过滤掉
    $post[$key] = str_replace("%", "\%", $val); //sql注入
    $post[$key] = nl2br($val);
    //转换html
    $post[$key] = htmlspecialchars($val); //xss攻击
  }
  return $post;
}
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