| 标题 | php进程间通讯实例分析 |
| 范文 | 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。 |
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