$host_name = "localhost";
    $database = "dbname";
    $username = "dbusername";
    $password = "dbpassword";
    try{
        $db = new PDO('mysql:host='.$host_name.';charset=utf8;dbname='.$database, $username, $password);
    }catch(PDOException $e){
        print "Hata " . $e->getMessage() . "<br/>";
        die();
    }
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);