PHP for Grown-ups

This document provides an overview of new features in PHP 6 and the intl extension that improve support for internationalization and localization. Some key points include: - PHP 6 includes full Unicode support throughout the engine, extensions, and API using the ICU library. - The intl extension includes classes for collating and sorting strings, formatting numbers and currencies based on locales, and transliterating between scripts. - New text iterator and text transform classes allow powerful linear and chained processing of Unicode text. - Streams support automatic encoding conversions for reading/writing files in different encodings. - Functions like strtoupper() now perform proper locale-aware case mappings.