Обработка формы авторизации битрикс

<?require_once($_SERVER['DOCUMENT_ROOT'] . "/bitrix/modules/main/include/prolog_before.php");
CModule::IncludeModule("iblock");

if($_SERVER["REQUEST_METHOD"] == "POST"){
	$arResult = array(
		'errors' => array(),
		'email' => 'empty'
	);
	$metro = trim($_POST['metro']);
	$login = trim($_POST['login']);
	$name = trim($_POST['name']);
	$pass = trim($_POST['password']);
	$email = trim($_POST['email']);
	$file = $_FILES['file'];

	if($_FILES['file']['tmp_name']) {
		$imgType = array('image/gif', 'image/jpeg', 'image/png');
		$types;
		foreach($imgType as $type) {
			if($type == $_FILES['file']['type']) {
				$types = true;
			}
		}
		if($types !== true) {
			$arResult["errors"][] = "Неверный формат изображения";
		}
			
	}

	if(!empty($email)) {
		if(!preg_match('/[0-9a-z]+[0-9a-z_\.\-]*@[0-9a-z_\-\.]+\.[a-z]{2,6}/i', $email)) {
			$arResult["errors"][] = "Некорректный email";
		} else {
			$arResult['email'] = "Y";
		}
	}

	if (strlen($name) < 3) {
		$arResult["errors"][] = 'Имя должно содержать не меньше 3 символов!';
	}

	if (strlen($login) < 3) {
		$arResult["errors"][] = 'Логин не должен содержать меньше 3 символов!';
	}

	$rsUsers = CUser::GetList(($by="personal_country"), ($order="desc"), array('LOGIN_EQUAL' => $login), array());
    while($rsUsers->NavNext(true, "f_")) :
        if($f_LOGIN == $login) {
            $arResult["errors"][] = 'Пользователь с таким логином уже существует!';
        }
    endwhile;
    
    unset($rsUsers);

	if (strlen($pass) < 3) {
		$arResult["errors"][] = 'Пароль должен содержать не меньше 3 символов!';
	}

  	if (empty($arResult['errors']) && $arResult['email'] === "Y") {

		global $USER;
	
		$result = $USER->Register($login, $name, "", $pass, $pass, $email);

		// foreach ($result as $key => $value) {
		// 	$arResult["errors"][] = $key . ' = ' . $value;
		// }

		if($result['TYPE'] == 'OK') {

			if($_FILES['file']['tmp_name']) {
				$fil = array(
					'name' => $_FILES['file']['name'],
					'size' => $_FILES['file']['size'],
					"tmp_name" => $_FILES['file']['tmp_name']
				);
	
				$arIMAGE = CFile::MakeFileArray(CFile::GetPath(CFile::SaveFile($fil, 'users/' . $login)));	
			} else {
				$arIMAGE = CFile::MakeFileArray($_SERVER['DOCUMENT_ROOT'] . '/upload/image-form-ad.jpg');
			}


			$fillter = array(
				'LOGIN_EQUAL' => $login,
				"ACTIVE"      => "N",
				'EMAIL' 	  => $email
			);

			$fields = array(
				"GROUP_ID" 		 => array(5),
				'PERSONAL_PHOTO' => $arIMAGE
			);

			$rsUsers = CUser::GetList(($by="personal_country"), ($order="desc"), $fillter, array());
			$user = new CUser;
			while($rsUsers->NavNext(true, "f_")) :
				$user->Update($f_ID, $fields);
			endwhile;
			$arResult["errors"][] = $user->LAST_ERROR;
		}		
	}	

	echo json_encode($arResult);
	die();
}
?>