本文实例讲述了PHP的消息通信机制。分享给大家供大家参考，具体如下：

<?php error_reporting(E_ALL&~E_WARNING&~E_NOTICE);
/**
 * Example for sending and receiving Messages via the System V Message Queue
 *
 * To try this script run it synchron/asynchron twice times. One time with ?type=send and one time with ?type=receive
 *
 * @author     Thomas Eimers - Mehrkanal GmbH
 *
 * This document is distributed in the hope that it will be useful, but without any warranty;
 * without even the implied warranty of merchantability or fitness for a particular purpose.
 */
ob_implicit_flush(1);
header("Content-Type: text/plain; charset=ISO-8859-1");
echo "Start...
";
// Create System V Message Queue. Integer value is the number of the Queue
//$queue = msg_get_queue(100379);
$mesg_key = ftok(__FILE__, "m");
$mesg_id = msg_get_queue($mesg_key, 0666);
$queue = $mesg_id;
// Sendoptions
$serialize_needed=false; // Must the transfer data be serialized ?
$block_send=false;    // Block if Message could not be send (Queue full...) (true/false)
$msgtype_send=1;     // Any Integer above 0. It signeds every Message. So you could handle multible message
             // type in one Queue.
// Receiveoptions
$msgtype_receive=1;    // Whiche type of Message we want to receive ? (Here, the type is the same as the type we send,
             // but if you set this to 0 you receive the next Message in the Queue with any type.
$maxsize=100;       // How long is the maximal data you like to receive.
$option_receive=MSG_IPC_NOWAIT; // If there are no messages of the wanted type in the Queue continue without wating.
             // If is set to NULL wait for a Message.
// Send or receive 20 Messages
for ($i=0;$i<20;$i++) {
   sleep(1);
  ob_flush();
  flush();
 $message="Hello, This is Flandy,now is ".date("H:i:s",time());   // Transfering Data
 // This one sends
  if (isset($_GET["type"])&&$_GET["type"]=="send") {
  if(msg_send($queue,$msgtype_send, $message,$serialize_needed, $block_send,$err)===true) {
   echo "The ".$i." Message has been sent, the messge is ".$message."
";
  } else {
   var_dump($err);
  }
 // This one received
 } else {
   $queue_status=msg_stat_queue($queue);
   echo "Get Messages in the queue: ".$queue_status["msg_qnum"]."
";
   print_r($queue_status);
   echo "
";
  if ($queue_status["msg_qnum"]>0) {
   if (msg_receive($queue,$msgtype_receive ,$msgtype_erhalten,$maxsize,$daten,$serialize_needed, $option_receive, $err)===true) {
       echo "Received data:".$daten."
";
   } else {
       var_dump($err);
   }
  }
 }
}
?>

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希望本文所述对大家PHP程序设计有所帮助。