PHP創建UDP服務器

<?php
//服務器信息 
$server = 'udp://127.0.0.1:9998'; 
//消息結束符號 
$msg_eof = "\n"; 
$socket = stream_socket_server($server, $errno, $errstr, STREAM_SERVER_BIND); 
if (!$socket) { 
    die("$errstr ($errno)"); 
} 
   
do { 
    //接收客戶端發來的信息 
    $inMsg = stream_socket_recvfrom($socket, 1024, 0, $peer); 
    //服務端打印出相關信息 
    echo "Client : $peer\n"; 
    echo "Receive : {$inMsg}"; 
    //給客戶端發送信息 
    $outMsg = substr($inMsg, 0, (strrpos($inMsg, $msg_eof))).' -- '.date("D M j H:i:s Y\r\n"); 
    stream_socket_sendto($socket, $outMsg, 0, $peer); 
       
} while ($inMsg !== false);




$socket = stream_socket_server("udp://127.0.0.1:1113", $errno, $errstr, STREAM_SERVER_BIND);

if (!$socket) {
    die("$errstr ($errno)");
}

do {
    $pkt = stream_socket_recvfrom($socket, 1, 0, $peer);
    echo "$peer\n";
    stream_socket_sendto($socket, date("D M j H:i:s Y\r\n"), 0, $peer);
} while ($pkt !== false);