What are good tools/frameworks for i18n of a php codebase?

Question

I have been looking at a few options for enabling localization and internationalization of a dynamic php application. There appears to be a variety of tools available such a

Answer 1

PHP gettext implementation works very smoothly. And po files with po edit and gettext are about as good a way as you can get to deal with localization bearing in mind that no solution of this kind can completely handle the complexities of the various languages. For example, the gettext method is very good on plural forms, but nothing I've seen can handle things like conjugation.

For more info see my post here: How do you build a multi-language web site?