php types of inclusion

Question

I just read some articles about php's require / require_once respectively include / include_once and was just wondering when _once should be used? Is it just the performace aspect or can I run into any difficulties when including / requiring the same file multiple times?

Possible duplicate of http://stackoverflow.com/questions/2418473/when-should-i-use-require-once-vs-include — ChicagoRedSox, Aug 26 '13 at 17:06

Sergiu Paraschiv · Accepted Answer · 2013-08-26T18:52:00.203

1

Think about this scenario:

<?php

function a() {
}

?>

What's going to happen when you include/require it twice? "function a already declared".

edited Aug 26 '13 at 18:52

answered Aug 26 '13 at 17:07

Sergiu Paraschiv

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Haven't thought about this. Thanks. – Rico Ocepek Aug 26 '13 at 17:25

php types of inclusion

1 Answers1