從udpsocket發送和獲取數據

Question

我正在使用服務器列表查看器，有人告訴我應該使用UdpSocket將數據發送到主服務器並從中接收數據（在本例中為MW2-IW4游戲）

這是您使用的命令或套接字

"\xff\xff\xff\getservers IW4 <MASTERSERVERPORTHERE> full empty\x00"

所以我嘗試使用此代碼

<?php  
  $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);

    $msg = "\xff\xff\xff\getservers IW4 <MASTERSERVERPORT> full empty\x00";
    $len = strlen($msg);

    socket_sendto($sock, $msg, $len, 0, 'MASTERSERVERIP' , 1223);
    socket_close($sock);
?>

但沒有收到任何數據，只是得到了數字36 ... PS：

i don't know much things about sockets.

Answer 1

不久前，我想出了如何做的事情，並想起了這篇文章，如果仍然有人感興趣，這就是您的做法：

<?php
$ip = "127.0.0.1";
$port = 1337;
$socket = fsockopen('udp://'.$ip, $port);
stream_set_blocking($socket, 0);
stream_set_timeout($socket, 1); //1 = timeout

fwrite($socket, "YOUR UDP COMMAND HERE\n");

$time=time()+1; //1=timeout
$returned = "";
while($time > time()) {
    $returned .= fgets($socket);
}


echo($returned); // the returned value
@fclose($socket); //we are done, so better close it.
?>

Answer 2

只需使用fsockopen，它會容易得多，

$fp = fsockopen("udp://127.0.0.1", 13, $errno, $errstr);

if (!$fp) echo "ERROR: $errno - $errstr<br />\n";

fwrite($fp, "\n");
while (!feof($fp)) {
    echo fgets($fp, 128);
}
fclose($fp);