PHP Socket communication UDP communication example

The example in this article describes the UDP communication method of PHP's Socket communication. Share it with everyone for your reference. The details are as follows:

1. Create a simple UDP server

//服务器信息
$server = 'udp://127.0.0.1:9998';
//消息结束符号
$msg_eof = "\n";
$socket = stream_socket_server($server, $errno, $errstr, STREAM_SERVER_BIND);
if (!$socket) {
  die("$errstr ($errno)");
}
do {
  //接收客户端发来的信息
  $inMsg = stream_socket_recvfrom($socket, 1024, 0, $peer);
  //服务端打印出相关信息
  echo "Client : $peer\n";
  echo "Receive : {$inMsg}";
  //给客户端发送信息
  $outMsg = substr($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);

2. A simple client

function udpGet($sendMsg = '', $ip = '127.0.0.1', $port = '9998'){
  $handle = stream_socket_client("udp://{$ip}:{$port}", $errno, $errstr);
  if( !$handle ){
    die("ERROR: {$errno} - {$errstr}\n");
  }
  fwrite($handle, $sendMsg."\n");
  $result = fread($handle, 1024);
  fclose($handle);
  return $result;
}
$result = udpGet('Hello World');
echo $result;

I hope this article will be helpful to everyone’s PHP programming design.

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