A morning office conversation:
Tony (a workmate): Is there a PHP function to stop for a moment the execution of a page?
Me: Yes, it is “sleep()”.
Tony: Just what I need, to sleep a little bit. Does it work with microseconds?
Me: No, it works with seconds. For example, if you write sleep(1), it is going to stop for 1 second.
Tony: Ok, thanks, you are a crack.
Me: And, even more, if you write sleep(2), it’ll stop for 2 seconds.
Tony: Why don’t we use it with a negative value? Probably we will speed up our websites!