Codeigniter support best PHP 5.3.x OR 5.4.x ??

[eluser]Unknown[/eluser]
Hello!

i'm server administrator in my company.

Please, help-me a simple question.

My new server PHP: FULL BEST = 5.3.x OR 5.4.x for codeigniter 2.1.x ??

Very tanks (sorry my bad inglish, i'm brazilian)

[eluser]PravinS[/eluser]
http://ellislab.com/codeigniter/user-gui...ments.html