[TIP] Test TCP Port with PHP

I need to test if specified TCP Port on specified Host is opened or Not, and i need to do it from a Web Service... This is my Solution a simple "ping" method written in PHP.

function qPing ($host, $port, $timeout = 5) {
    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    if ($socket === false) return(1);

    if (!socket_set_nonblock($socket))
        return(2);

    $time = time();
    while (!@socket_connect($socket, $host, $port)) {
        $err = socket_last_error($socket);
        if ($err == 115 || $err == 114) {
            if ((time() - $time) >= $timeout) {
                socket_close($socket);
                return(3);    # Connection timed out.
            }
            usleep(500);
            continue;
        }
        echo $err . ' ' . socket_strerror($err) . "\n";
        return(4);
    }

    socket_close($socket);
    return(0);
}