gistfile1.php

<?php
function pingNetwork($hostname, $port = 25565) {
  $packet = "\xFE\x01";
	$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

	try {
		$sConnectStatus = @socket_connect($socket, $hostname, $port);
		if (!$sConnectStatus) return false;
		
		$sWriteStatus = @socket_write($socket, $packet, strlen($packet));
		if (!$sConnectStatus) return false;
		
		$rHeader = @socket_read($socket, 3, PHP_BINARY_READ);
		$rPacketID = $rHeader[0];
		if ($rPacketID != "\xFF") return false;
		
		$rPayloadSize = unpack("n", substr($rHeader, 1));
		$rPayloadSize = $rPayloadSize[0];
		
		$rPayload = "";
		socket_read($socket, 6);
		while (($b = socket_read($socket, 1)) !== "") {
			$rPayload .= $b;
		}
		
		$rPayload = explode("\x00\x00", $rPayload);
		$sProto = $rPayload[0];
		$sVersion = $rPayload[1];
		
		$sRawMessage = $rPayload[2];
		$sMessage = "";
		for ($i = 0; $i < strlen($sRawMessage); $i++) {
			$char = $sRawMessage[$i];
			$nextChar = ($i + 1 < strlen($sRawMessage) ? $sRawMessage[$i + 1] : null);
			
			if ($char == "\x00" && $nextChar == "\xa7") {
				$i += 3;
			} else {
				$sMessage .= $char;
			}
		}
		
		$sPlayers = $rPayload[3];
		$sPlayers = intval(str_replace("\x00", "", $sPlayers));
		
		return array(
			"version" => array(
				"protocol" => $sProto,
				"client" => $sVersion
			),
			"motd" => $sMessage,
			"players" => $sPlayers
		);
	} catch (Exception $ex) {
		return false;
	}
}