public function filterNickname($nickname){
        $nickname = preg_replace('/[\x{1F600}-\x{1F64F}]/u', '', $nickname);

        $nickname = preg_replace('/[\x{1F300}-\x{1F5FF}]/u', '', $nickname);

        $nickname = preg_replace('/[\x{1F680}-\x{1F6FF}]/u', '', $nickname);

        $nickname = preg_replace('/[\x{2600}-\x{26FF}]/u', '', $nickname);

        $nickname = preg_replace('/[\x{2700}-\x{27BF}]/u', '', $nickname);
        $nickname = preg_replace('/[\xf0-\xf7].{3}/', '', $nickname);

        $nickname = str_replace(array('"','\''), '', $nickname);

        return addslashes(trim($nickname));
    }