protected $packetID;

protected $data;

public function __construct ($packetID) {

$this->packetID = $packetID;

$this->data = pack('C', $packetID);

}

public function addSignedChar ($data) {

$this->data .= pack('c', $data);

}

public function addUnsignedChar ($data) {

$this->data .= pack('C', $data);

}

public function addSignedShort ($data) {

$this->data .= pack('s', $data);

}

public function addUnsignedShort ($data) {

$this->data .= pack('S', $data);

}

public function addString ($data) {

$this->data .= pack('C', strlen($data));

$this->data .= $data;

}

public function send ($socket) {

$this->data = pack('C', strlen($this->data)) . $this->data;

socket_send($socket, $this->data, strlen($this->data), 0);

}

public function __construct ($host, $port, $protocol, $nextState) {

parent::__construct(0);

$this->addUnsignedChar($protocol);

$this->addString($host);

$this->addUnsignedShort($port);

$this->addUnsignedChar($nextState);

}

public function __construct () {

parent::__construct(0);

}

/**

* Queries the server and returns the servers information

*

* @param string $host

* @param number $port

*/

public static function query ($host = '127.0.0.1', $port = 25565) {

// check if the host is in ipv4 format

$host = filter_var($host, FILTER_VALIDATE_IP) ? $host : gethostbyname($host);

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

if (! @socket_connect($socket, $host, $port)) {

return false;

}

// create the handshake and ping packet

$handshakePacket = new HandshakePacket($host, $port, 107, 1);

$pingPacket = new PingPacket();

$handshakePacket->send($socket);

// high five

$start = microtime(true);

$pingPacket->send($socket);

$length = self::readVarInt($socket);

$ping = round((microtime(true) - $start) * 1000);

// read the requested data

$data = socket_read($socket, $length, PHP_NORMAL_READ);

$data = strstr($data, '{');

$data = json_decode($data);

$descriptionRaw = isset($data->description) ? $data->description : false;

$description = $descriptionRaw;

// colorize the description if it is supported

if (gettype($descriptionRaw) == 'object') {

$description = '';

if (isset($descriptionRaw->text)) {

$color = isset($descriptionRaw->color) ? $descriptionRaw->color : '';

$description = '<font color="' . $color . '">' . $descriptionRaw->text . '</font>';

}

if (isset($descriptionRaw->extra)) {

foreach ($descriptionRaw->extra as $item) {

$description .= isset($item->bold) && $item->bold ? '<b>' : '';

$description .= isset($item->color) ? '<font color="' . $item->color . '">' . $item->text . '</font>' : '';

$description .= isset($item->bold) && $item->bold ? '</b>' : '';

}

}

}

return array(

'hostname' => $host,

'port' => $port,

'ping' => $ping,

'version' => isset($data->version->name) ? $data->version->name : false,

'protocol' => isset($data->version->protocol) ? $data->version->protocol : false,

'players' => isset($data->players->online) ? $data->players->online : false,

'max_players' => isset($data->players->max) ? $data->players->max : false,

'description' => $description,

'description_raw' => $descriptionRaw,

'favicon' => isset($data->favicon) ? $data->favicon : false,

'modinfo' => isset($data->modinfo) ? $data->modinfo : false

);

}

private static function readVarInt ($socket) {

$a = 0;

$b = 0;

while (true) {

$c = socket_read($socket, 1);

if (! $c) {

return 0;

}

$c = Ord($c);

$a |= ($c & 0x7F) << $b ++ * 7;

if ($b > 5) {

return false;

}

if (($c & 0x80) != 128) {

break;

}

}

return $a;

}