Exit Function

Why is it a good idea? Imagine if you don't and these conditionals are processing cc numbers. You'd have a lot of explaining to do.

The exit function is simply to halt any other PHP from being processed. So by using this in the conditional when the conditional fails, you're safe guarding your visitors from unintended content, processing of items that shouldn't have executed and more.

Granted there's no hard rules on code, just guidelines that work. I hope this helps.

Hello,

Michael explains it great. Also, it's a good idea to put exit() or die() after redirects as well so no other code gets ran or the rest of the page doesn't display in the amount of time it takes for the redirect to take place. exit() and die() are the same thing and there is no better one over the other it's just preference,

I would like to include with Michael's statement that sometimes in your coding you want to have dead ends where you want the page to finish early for whatever reason. PHP runs your script from top to bottom and doesn't stop till either it reaches the end of the script, it errors out (run-time errors), or if it gets redirected off the page. You would use the exit() or die() to tell the parser to stop processing the script. Learn more about exit() here and die() here.

Cheers!

Thank you Shawn great explanation. I understand now why it is wise to use die or exit.

I appreciate you answering this question.

Giovanni