PHP下查询游戏《Minecraft》多人游戏 服务器的人数。

废话不多说，直接上图：

作为一个优雅的Minecraft服务器，肯定需要官网的嗯。

很多服务器的官网都有显示当前服务器在线人数，延迟，每一个子服在线人数，甚至出了个流量图。

我们不搞花里胡哨的查询人数，直接用最简单的代码去完成一个简约的人数查询。

很好，让我们来搞吧！

首先我们需要引用一个外部PHP文件。

名字可以起做STATUS.CLASS.php

然后里面加入如下代码：

 <?php

     /**
     * Minecraft服务器状态查询
     * @作者 Julian Spravil <julian.spr@t-online.de> Git地址：https://github.com/FunnyItsElmo
     * @本库免费使用，但不要删除作者和版权。     */
     class MinecraftServerStatus {

         private $timeout;

         public function __construct($timeout = 2) {
             $this->timeout = $timeout;
         }

         public function getStatus($host = '127.0.0.1', $version = '1.7.*' , $port = 25565) {

             if (substr_count($host , '.') != 4) $host = gethostbyname($host);

             $serverdata = array();
             $serverdata['hostname'] = $host;
             $serverdata['version'] = false;
             $serverdata['protocol'] = false;
             $serverdata['players'] = false;
             $serverdata['maxplayers'] = false;
             $serverdata['motd'] = false;
             $serverdata['motd_raw'] = false;
             $serverdata['favicon'] = false;
             $serverdata['ping'] = false;

             $socket = $this->connect($host, $port);

             if(!$socket) {
                 return false;
             }

             if(preg_match('/1.7|1.8/',$version)) {

                 $start = microtime(true);

                 $handshake = pack('cccca*', hexdec(strlen($host)), 0, 0x04, strlen($host), $host).pack('nc', $port, 0x01);

                 socket_send($socket, $handshake, strlen($handshake), 0); //give the server a high five
                 socket_send($socket, "\x01\x00", 2, 0);
                 socket_read( $socket, 1 );

                 $ping = round((microtime(true)-$start)*1000); //calculate the high five duration

                 $packetlength = $this->read_packet_length($socket);

                 if($packetlength < 10) {
                     return false;
                 }

                 socket_read($socket, 1);

                 $packetlength = $this->read_packet_length($socket);

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

                 if(!$data) {
                     return false;
                 }

                 $data = json_decode($data);

                 $serverdata['version'] = $data->version->name;
                 $serverdata['protocol'] = $data->version->protocol;
                 $serverdata['players'] = $data->players->online;
                 $serverdata['maxplayers'] = $data->players->max;

                 $motd = $data->description;
                 $motd = preg_replace("/(§.)/", "",$motd);
                 $motd = preg_replace("/[^[:alnum:][:punct:] ]/", "", $motd);

                 $serverdata['motd'] = $motd;
                 $serverdata['motd_raw'] = $data->description;
                 $serverdata['favicon'] = $data->favicon;
                 $serverdata['ping'] = $ping;

             } else {

                 $start = microtime(true);

                 socket_send($socket, "\xFE\x01", 2, 0);
                 $length = socket_recv($socket, $data, 512, 0);

                 $ping = round((microtime(true)-$start)*1000);//calculate the high five duration

                 if($length < 4 || $data[0] != "\xFF") {
                     return false;
                 }

                 $motd = "";
                 $motdraw = "";

                 //Evaluate the received data
                 if (substr((String)$data, 3, 5) == "\x00\xa7\x00\x31\x00"){

                     $result = explode("\x00", mb_convert_encoding(substr((String)$data, 15), 'UTF-8', 'UCS-2'));
                     $motd = $result[1];
                     $motdraw = $motd;

                 } else {

                     $result = explode('§', mb_convert_encoding(substr((String)$data, 3), 'UTF-8', 'UCS-2'));
                         foreach ($result as $key => $string) {
                             if($key != sizeof($result)-1 && $key != sizeof($result)-2 && $key != 0) {
                                 $motd .= '§'.$string;
                             }
                         }
                         $motdraw = $motd;
                     }

                     $motd = preg_replace("/(§.)/", "", $motd);
                     $motd = preg_replace("/[^[:alnum:][:punct:] ]/", "", $motd); //Remove all special characters from a string

                     $serverdata['version'] = $result[0];
                     $serverdata['players'] = $result[sizeof($result)-2];
                     $serverdata['maxplayers'] = $result[sizeof($result)-1];
                     $serverdata['motd'] = $motd;
                     $serverdata['motd_raw'] = $motdraw;
                     $serverdata['ping'] = $ping;

             }

             $this->disconnect($socket);

             return $serverdata;

         }

         private function connect($host, $port) {
             $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
             socket_connect($socket, $host, $port);
             return $socket;
         }

         private function disconnect($socket) {
             if($socket != null) {
                 socket_close($socket);
             }
         }

         private function read_packet_length($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;
         }

     }
 ?>

很好，我们继续。

再新建一个php文件，名字和上面一样随意。然后复制如下代码到里面。

 <?php
    include_once 'status.class.php';

    $status = new MinecraftServerStatus(); // 类
    $response = $status-> getStatus('s1.devicloud.cn', 25565); // 服务器地址

if(!$response) {
    echo"服务器可能离线!";
} else {
    echo"".$response['players']."";
}

?> 

好，就这样。

其中include_once 'status.class.php';

是上面引用PHP库的相对路径。

如果那个PHP库在同级目录的libraries文件夹下，那就应该这样写：

include_once '/libraries/status.class.php';

然后就可以在你的网页内调用这段代码啦！

调用：

结果：