[MediaWiki-l] When loading extensions is require_once or include_once preferred?

I'm getting ready to update my wiki and noticed that extensions are not declared the same way in LocalSettings.php. I have about 57 extensions, and all but 7 use 'require_once'

From a programmatic standpoint, the difference appears to be in how PHP

will handle errors.

From http://www.w3schools.com/php/php_includes.asp

The require() function is identical to include(), except that it handles errors differently. If an error occurs, the include() function generates a warning, but the script will continue execution. The require() generates a fatal error, and the script will stop.

In the general scheme of things, is one a better practice over the other? Is it nuanced between extensions in such a way that some extensions need one over the other?

Yours, Chris Koerner clkoerner.com