本文实例讲述了php进程间通讯的方法。分享给大家供大家参考，具体如下：

php单进程单线程处理批量任务太慢了,受不鸟了,但是php不能多线程,最终选择了多进程处理批量任务.

php多进程主要使用for进行分裂,然后利用的unix/linux的信号量进行进程间通讯.

本例使用的是:生产者=>消费者=>收集器,的模式.

<?php

// ===== 全局变量 =====

// ipc进程间通讯

$key = ftok(__FILE__, "a");

$queue = msg_get_queue($key);

// 进程ID

$producer_pid = 0;

$consumers_pid = array();

$collector_pid = posix_getpid();

// ===== 消费者 =====

for ($i=0; $i < 2; $i++) {

  $consumer_pid = pcntl_fork();

  if ($consumer_pid == -1) {

    exit("could not fork!\n");

  } else if ($consumer_pid) {

    // pcntl_wait($status);

    echo "consumer_pid: $consumer_pid\n";

    $consumers_pid[] = $consumer_pid;

  } else {

    $pid = posix_getpid();

    echo "consumer_pid: $pid start\n";

    while (true) {

      msg_receive($queue, $pid, $msgtype, 1024, $message);

      if ($message == "exit") {

        break;

      }

      // 数据处理

      $n = intval($message);

      msg_send($queue, $collector_pid, $n * $n);

    }

    exit("consumer ok!\n");

  }

}

// ===== 产生者 =====

$producer_pid = pcntl_fork();

if ($producer_pid == -1) {

  exit("could not fork!\n");

} else if ($producer_pid) {

  // pcntl_wait($status);

  echo "producer_pid: $producer_pid\n";

} else {

  $pid = posix_getpid();

  echo "producer_pid: $pid start\n";

  $n = 0;

  for ($i=0; $i < 10; $i++) {

    foreach ($consumers_pid as $consumer_pid) {

      $n++;

      msg_send($queue, $consumer_pid, $n);

    }

    sleep(1);

  }

  foreach ($consumers_pid as $consumer_pid) {

    msg_send($queue, $consumer_pid, "exit");

  }

  sleep(1);

  msg_send($queue, $collector_pid, "exit");

  exit("producer ok!\n");

}

// ===== 收集器 =====

while (true) {

  msg_receive($queue, $collector_pid, $msgtype, 1024, $message);

  if ($message == "exit") {

    break;

  }

  echo sprintf("% 5d: %d\n", $msgtype, $message);

}

exit("collector ok!\n");

希望本文所述对大家PHP程序设计有所帮助。