What is a practical use for PHP's sleep()?

Question

I just had a look at the docs on sleep().

Where would you use this function?

Is it there to give the CPU a break in an expensive function?

Any common

Answer 1

Another way to use it: if you want to execute a cronjob more often there every minute. I use the following code for this:

sleep(30);
include 'cronjob.php';

I call this file, and cronjob.php every minute.