/**
* 添加守护进程
*
* $a = 890;
*
* $pid = daemon(function() use ($a){
*
* echo $a;
*
* sleep(1);
*
* },function(){
*
* echo 456;
*
* });
* @return int
*/
function daemon()
{
$child_threads = func_get_args();
$t = new Thread();
foreach ($child_threads as $child_thread) {
$t->daemon($child_thread);
}
$t->run();
return $t->getpid();
}