How can I start two processes simultaneously?

I would like to start using thread with PHP. Could开发者_Go百科 someone give me an example about how to start two simultaneous processes?

---

If you want to spawn multiple PHP processes that run in the background (or not), you should have a look at the manual entry on Program Execution. It lists all the methods that allow you to spawn a new process to handle background tasks

http://www.php.net/manual/en/ref.exec.php

---

You can fork processes with PCNTL extension. http://php.net/manual/tr/book.pcntl.php

$pid = pcntl_fork();
if ($pid) {
     // main
     pcntl_wait($status);
} else {
     // child
}