function verify_login($u, $p){
    global $db;
    $name;
    $password;
    $id;

    $query = "SELECT id, name, password FROM admins WHERE name=? AND password=? LIMIT 1";
    $stmt = $db->prepare( $query );
    // ss predstavuju dva stringy ... cislo by bolo asi d
    $stmt->bind_param( 'ss', $user, $pass );

    $user = $u;
    $pass = hash("sha512",$p);

    $stmt->execute();
    //treba nabindovat tolko, kolko mas spomenutych v selecte a treba to asi robit
    // v spravnom poradi
    $stmt->bind_result( $id, $name, $password );
    //keby bol vysledok viac ako 1 treba to hodid do cyklu
    $data = $stmt->fetch();

    if( count($data) > 0 ){
        $_SESSION['id']  = $id;
        $_SESSION['name'] = $name;
        $_SESSION['session_id'] = session_id();
        return true;
    }else{
        return false;
    }
}