创建子进程
$ppid = posix_getpid();
4 $pid = pcntl_fork();
5 if ($pid == -1) {
6 throw new Exception('fork子进程失败!');
7 } else if ($pid > 0) {
8 cli_set_process_title("我是父进程,我的进程id是{$ppid}.");
9 sleep(10);
10 } else {
11 $cpid = posix_getpid();
12 cli_set_process_title("我是{$ppid}的子进程,我的进程id是{$cpid}.");
13 sleep(30);
14 }