PHPBuilder.com excerpts once again from the Sams Publishing book "PHP 5 in Practice" today with this new tutorial showing a method for localizing web pages for different languages.
Internationalization and localization of a web page is simply the act of setting it up to be able to handle displaying in multiple languages and adding those different languages in. There are many different ways in which to do this. One of the simplest is to just make sure that all your strings that you ever output are stored as variables or constants in an included file. That way, you can make multiple copies of that file,each with different language versions written into them. Just include the appropriate file for the language that you want to display.
They show the creation of the different language PHP files that will be included and the master "language.php" that works with the under's input to switch to the correct language (and set a cookie to save the preference).