This article brings you an introduction to the usage of PHP's Pcntl multi-process extension. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
PHP provides a Pcntl extension. Pcntl is based on the Linux process. Windows systems do not have this extension for the time being. It is used to implement basic multi-process implementation. You can use this to handle a time-consuming task, such as sending subscription emails. , text messages, site messages, etc.
Sample code:
The code is based on the Laravel framework. It is recommended to use this framework to allow this part of the code.
public function index(Request $request)
{
pcntl_signal(SIGCHLD, SIG_IGN); //如果父进程不关心子进程什么时候结束,子进程结束后，内核会回收。
$max = 8000;
$workers = 10;
$pids = array();
for($i = 0; $i < $workers; $i++){
$pids[$i] = pcntl_fork();
$pid = posix_getpid();
switch ($pids[$i]) {
case -1:
echo "fork error : {$i} \r\n";
exit;
case 0:
$param = array(
'lastid' => $max / $workers * $i,
'maxid' => $max / $workers * ($i+1),
);
$this->doSomething($pid, $param);
exit;
default:
break;
}
}
foreach ($pids as $i => $pid) {
if($pid) {
//父进程会得到子进程号，所以这里是父进程执行的逻辑
//如果不需要阻塞进程，而又想得到子进程的退出状态，则可以注释掉pcntl_wait($status)语句，或写成：
pcntl_wait($status,WNOHANG); //等待子进程中断，防止子进程成为僵尸进程。
//pcntl_waitpid($pid, $status);
}
}
}
// 可以看到那个子进程在处理哪些数据
public function doSomething($filename, $param)
{
for ($i = $param['lastid']; $i < $param['maxid']; $i++) {
$path = "./test/";
if (!is_dir($path)){
mkdir($path, 0777, true);
}
$content = $i . '|';
$file = $path . $filename . ".txt";
file_put_contents($file, $content, FILE_APPEND);
}
}More suggestions are to read documents, processes and threads, there is a lot of content, you need to read and learn
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