Maybe you haven't noticed, but when your mouse hovers over the code above, you will see a menu with links to view the code in plain text, print, or copy to the clipboard.

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I've been searching for a typo3 extension to use when I want to display some code on my pages.

I haven't had much luck because most of them have issues. I'm talking about conflicts with other extensions. One code highlighting extension caused a fatal error of some sort which I wasn't in the mood to debug.

Anyhow, today I found out about the beautyOfCode extension which you can see it's output below.  I forgot which layout theme I'm using at the moment, but the extension lets you choose from a variety of layouts.