function validName($name){
    global $data, $mysqli;
    $lowname = mb_strtolower($name);
    $reserved = array('b_o_o_m', 'my_notice', 'cody_act');
    foreach ($reserved as $sreserve){
        if(stripos($lowname,mb_strtolower($sreserve)) !== FALSE){
            return false;
        }
    }
    $get_name = $mysqli->query("SELECT word FROM boom_filter WHERE word_type = 'username'");
    if($get_name->num_rows > 0){
        while($reject = $get_name->fetch_assoc()){
            if (stripos($lowname, mb_strtolower($reject['word'])) !== FALSE) {
                return false;
            }
        }
    }

    if( mb_strlen($name, 'UTF-8') <= $data['max_username'] && mb_strlen($name, 'UTF-8') >= 2){
        return true;
    }
    return false;
}