$data = [
    "command" => "login",
    "arguments" => [
        "userId" => my-id,
        "password" => my-password
        ]
    ];

$in = json_encode($data);

$service_port = 5124;
$address = gethostbyname('xapia.x-station.eu');

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
    echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "n";
}

$result = socket_connect($socket, $address, $service_port);
if ($result === false) {
    echo "socket_connect() failed.nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "n";
}


socket_write($socket, $in, strlen($in));

while ($out = socket_read($socket, 2048)) {
    echo $out;
}

socket_close($socket);