Quick Introduction to PHP 5
The groundbreaking release of PHP 3 in 1997 revolutionized the way in which Web sites are developed, and made it possible for everyone to create simple, yet powerful Web applications. PHP 4 took PHP much further by introducing the Zend® Engine, pushing the performance of PHP through the roof, and allowing it to be more extensible than ever before.
PHP Version 5 marks a historical milestone for PHP, featuring a variety of important new features and major improvements. The Zend Engine II, the heart of PHP 5, features a brand new and extremely powerful Object Oriented programming model, that allows for the development of large scale, object-based applications, using common development methodologies and design patterns.
The Zend Engine II also provides the infrastructure for revolutionary new extension modules that will make PHP even easier and more powerful than what you’ve learned to expect.
[More..]