PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly. It is a project of the Apache Software Foundation.

Changes in Current Version:

• PHP 5 features the Zend Engine 2
  
• XML support has been completely redone in PHP 5, all extensions are now focused around the excellent libxml2 library
  
• SQLite has been bundled with PHP
  
• Streams have been greatly improved, including the ability to access low-level socket operations on streams

Go here for download (www.php.net)