Php睡眠功能延迟？

Question

Suppose a website with 'high' traffic, I want to use the php sleep(4) function to avoid flooding. Is it a good idea or should I use different delay ways ? sleep() keeps a connection open, could this be a problem ?

I do:

index.php -> stuff.php -> index.php

Stuff.php does something and then sleep(4); so the user waits 4 seconds with a blank screen, and then goes back to index. Thanks.

Update: My enemies are both, hackers, that wants a DOS, and stressed pepole that click fast on the search button, lets say... Thats why I would use a server-side delay.

Answer 1

It is not good approach because even doing 'sleep' apache/php still occupies OS process for that connection. So, on website with high traffic you will get lots of simultaneously running Apache processes that will eat all your server's RAM.

Instead, You can modify one of your pages and put some Javascript code to it, so it could wait for few seconds, and then navigate to the next page by javascript. That should solve your problem.