query.php

<?php

// Query code for PocketMine Banners

define('SERVEROK',    0);
define('SERVER_DOWN',    1);
define('SERVERINVALID',  2);
define('UNKNOWN_ERROR',  3);
define('TIMEOUT',        1);

function UT3QueryServer($host,$port,&$return)
{  
    $sock = @fsockopen( "udp://" . $host, $port );
    if ( !$sock ) return SERVERINVALID;
    socket_set_timeout( $sock, 0, 500000 );
    if ( !@fwrite( $sock, "\xFE\xFD\x09\x10\x20\x30\x40\xFF\xFF\xFF\x01" ) )
        return SERVER_DOWN;
    $challenge = fread( $sock, 1400 );
    if ( !$challenge )
        return UNKNOWN_ERROR;
    $challenge = substr( preg_replace( "/[^0-9\-]/si", "", $challenge ), 1 );
    $query = sprintf(
        "\xFE\xFD\x00\x10\x20\x30\x40%c%c%c%c\xFF\xFF\xFF\x01",
        ( $challenge >> 24 ),
        ( $challenge >> 16 ),
        ( $challenge >> 8 ),
        ( $challenge >> 0 )
        );
    if ( !@fwrite( $sock, $query ) )
        return UNKNOWN_ERROR;
    $response = array();
    for ($x = 0; $x < 2; $x++)
    {
        $response[] = @fread($sock,2048);
    }
    $response = implode($response);
    $response = substr($response,16);
    $response = explode("\0",$response);
    array_pop($response);
    array_pop($response);
    array_pop($response);
    array_pop($response);
    $return = array();
    $type = 0;
    foreach ($response as $key)
    {
        if ($type == 0) $val = $key;
        if ($type == 1) $return[$val] = $key;

        $type == 0 ? $type = 1 : $type = 0;
    }
    return SERVEROK;  
}
    $host = $_GET['host'];
	$port = $_GET['port'];
	if (empty($_GET['port'])) {
    	$port = 19132;
	}
    $values = '';
    $returnvalue = UT3QueryServer($host,$port,$values);
    if($returnvalue != SERVEROK){
        $ostatus = 2;
    }else{
        $currentplayers = $values['numplayers'];
        $maxplayers    = $values['maxplayers'];
        $hostname      = $values['hostname'];
        $percent = (((int)$currentplayers / (int)$maxplayers)*100);

        // echo $percent;
        $ostatus = 1;
        // echo 'Players: '.$currentplayers.'/'.$maxplayers.'<br><br>';
    }