The PHP-GTK Community site has gone multilingual to help reach out to a broader audience:

A new block has appeared today on top right corner of the php-gtk.eu pages, with three little flags : they show you can now navigate the site in one of these languages and, more importantly, automatically find the translated versions of all articles when they exist ... or contribute one yourself if you are logged in to the site.

Right now they offer English, French and German and they're still working on translating some parts of the UI of the site, but the articles and content should be translated over just fine.

On the ThinkPHP blog, Florian Eibeck has posted an overview of some key things to consider when internationalizing your application/website.

The biggest problem is that most developers lack knowledge about Internationalisation, Localisation, Character encodings, Unicode and all those terms connected with multilingualism. The following article should give you a basic understanding and show you how to avoid those funny characters.

He defines a few terms - internationalization, ASCII, unicode and the UTF-8/ISO-8859 character sets. He mentions how to accept the utf-8 string into your application and how to use it in both PHP and store it in a MySQL database.

Developer.com has a new tutorial posted today dealing with a specific use of one of the more popular PHP frameworks currently, the Zend Framework, and using it to create multi-lingual websites from Jason Gilmore.

Despite my best attempts I'm unable to speak this array of languages, but as a Web developer I wanted to create the most efficient means for hosting a multi-lingual support site, and then work with native speakers to translate the English material. Because the support site runs the Zend Framework, naturally I wondered whether some sort of translation component was available, and sure enough a quick perusal of the Zend Framework website turned up Zend_Translate. In this brief tutorial I'll document how I'm using the Zend Framework to make my website available to the world.

Jason breaks up the article into two main sections - an introduction to using the Zend_Translate component and examples of it in action (including the creation of CSV files to trade out the translations.

On the Sanisoft blog today, there's a quick tutorial demonstrating how to create a multilingual application with the CakePHP framework:

There are basic two ways to creating a multilingual app in traditional PHP [...] CakePHP V1.2 is the framework which allows you to take the quantum leap of using gettext like functionality with minimum of hassles and at the same time address the common problems which a PHP programmer faces while creating multilingual apps.

They give an example of a simple translation of a sentence (including working with .po files). They show how to integrate the example string, create the .po file with the translation and configure the language to pull the correct phrasing to display to the page.