php进程间通讯实例分析
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2020-12-19
04:58:32
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php进程间通讯实例分析进程间通讯实例分析
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:生产者生产者=>消费者消费者=>收集器收集器,的模式的模式.
<?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!");
} else if ($consumer_pid) {
// pcntl_wait($status);
echo "consumer_pid: $consumer_pid";
$consumers_pid[] = $consumer_pid;
} else {
$pid = posix_getpid();
echo "consumer_pid: $pid start";
while (true) {
msg_receive($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!");
}
}
// ===== 产生者 =====
$producer_pid = pcntl_fork();
if ($producer_pid == -1) {
exit("could not fork!");
} else if ($producer_pid) {
// pcntl_wait($status);
echo "producer_pid: $producer_pid";
} else {
$pid = posix_getpid();
echo "producer_pid: $pid start";
$n = 0;
for ($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, $collector_pid, "exit");
exit("producer ok!");
}
// ===== 收集器 =====
while (true) {
msg_receive($queue, $collector_pid, $msgtype, 1024, $message);
if ($message == "exit") {
break;
}
echo sprintf("% 5d: %d\n", $msgtype, $message);
}
exit("collector ok!");
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