Swoole\Process::kill (PECL swoole >= 1.9.0)Swoole\Process::kill — Send signal to the child process. 说明 public static Swoole\Process::kill(int $pid, int $signal_no = ?): bool Send signal to the child process. 参数 pid Process pid signal_no Signal to be sent 返回值 成功时返回 true， 或者在失败时返回 false。