本文實(shí)例講述了php進(jìn)程間通訊的方法。分享給大家供大家參考，具體如下：
php單進(jìn)程單線程處理批量任務(wù)太慢了,受不鳥了,但是php不能多線程,最終選擇了多進(jìn)程處理批量任務(wù).
php多進(jìn)程主要使用for進(jìn)行分裂,然后利用的unix/linux的信號量進(jìn)行進(jìn)程間通訊.
本例使用的是:生產(chǎn)者=>消費(fèi)者=>收集器,的模式.
<?php
// ===== 全局變量 =====
// ipc進(jìn)程間通訊
$key = ftok(__FILE__, "a");
$queue = msg_get_queue($key);
// 進(jìn)程ID
$producer_pid = 0;
$consumers_pid = array();
$collector_pid = posix_getpid();
// ===== 消費(fèi)者 =====
for ($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(shù)據(jù)處理
$n = intval($message);
msg_send($queue, $collector_pid, $n * $n);
}
exit("consumer ok!\n");
}
}
// ===== 產(chǎn)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(shè)計(jì)有所幫助。