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本文實例講述了php進程間通訊的方法。分享給大家供大家參考，具體如下：

php單進程單線程處理批量任務太慢了,受不鳥了,但是php不能多線程,最終選擇了多進程處理批量任務.

php多進程主要使用for進行分裂,然后利用的unix/linux的信號量進行進程間通訊.

本例使用的是:生產者=>消費者=>收集器,的模式.

<?php

// ===== 全局變量 =====

// ipc進程間通訊

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

$queue = msg_get_queue($key);

// 進程ID

$producer_pid = 0;

$consumers_pid = array();

$collector_pid = posix_getpid();

// ===== 消費者 =====

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;

      }

      // 數據處理

      $n = intval($message);

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

    }

    exit("consumer ok!\n");

  }

}

// ===== 產生者 =====

$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");

希望本文所述對大家PHP程序設計有所幫助。