yii2如何防止xss攻击

/* 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; }