PHP Socket UDP communication

How does PHP's Socket perform UDP communication? This article mainly introduces the UDP communication method of PHP's Socket communication, and analyzes the related skills of PHP's UDP communication based on socket with examples. I hope to be helpful.

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. 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;

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