推荐一个PHP扩展 来真正实现PHP多线程的开发

<?php
class AsyncOperation extends Thread {
public function __construct($arg){
$this->arg = $arg;
}

public function run(){
if($this->arg){
printf("Hello %s\n", $this->arg);
}
}
}
$thread = new AsyncOperation("World");
if($thread->start())
$thread->join();
?>