Get server info

info.php

<?php

/**
 * Script for get info from target server
 * @link   https://github.com/Frago9876543210
 * @author Frago9876543210
 */

declare(strict_types=1);

class ServerInfo{
	/** @var  string $host */
	private $host;
	/** @var  int $port */
	private $port;
	/** @var  resource */
	private $socket;

	const MAGIC = "\x00\xff\xff\x00\xfe\xfe\xfe\xfe\xfd\xfd\xfd\xfd\x12\x34\x56\x78";
	const MAX_INT = 2147483647;

	public function __construct(string $host, int $port = 19132){
		$this->host = $host;
		$this->port = $port;
		$this->socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
		$randomPort = mt_rand(49152, 65535);
		if(!socket_bind($this->socket, "0.0.0.0", $randomPort)){
			echo "Port $randomPort is already used!" . PHP_EOL;
			exit(1);
		}
	}


	public function sendUnconnectedPing() : array{
		socket_sendto($this->socket, "\x01" . pack("NN", mt_rand(0, self::MAX_INT), mt_rand(0, self::MAX_INT)) . self::MAGIC, 25, 0, $this->host, $this->port);
		socket_recvfrom($this->socket, $bytes, 65535, 0, $address, $port);
		socket_close($this->socket);
		return (ord($bytes[0]) === 0x1c) ? explode(";", substr($bytes, 35)) : [];
	}
}

$serverInfo = new ServerInfo("play.lbsg.net");
var_dump($serverInfo->sendUnconnectedPing());