PHP is a server-side scripting language for creating dynamic Web pages. You create pages with PHP and HTML. When a visitor opens the page, the server processes the PHP commands and then sends the results to the visitor's browser, just as with ASP or ColdFusion. Unlike ASP or ColdFusion, however, PHP is Open Source and cross-platform. PHP runs on Windows NT and many Unix versions, and it can be built as an Apache module and as a binary that can run as a CGI. When built as an Apache module, PHP is especially lightweight and speedy. Without any process creation overhead, it can return results quickly, but it doesn't require the tuning of mod_perl to keep your server's memory image small.

Drupal is a content management system that makes use of modules to allow site administrators to organize and display content, customize appearance and manage routine tasks, such as registration for websites requiring user names and passwords. One of Drupal's key characteristics is the fact that the entire Drupal framework is open source, meaning that the source code is available to anyone interested in working with it. The system itself is also free for all users, and while some web designers sell certain types of Drupal customization, many themes and modules are available for free as well.

WordPress is an open source Content Management System (CMS), often used as a blog publishing application, powered by PHP and MySQL. It has many features including a plug-in architecture and a template system. WordPress is used by over 13% of the 1,000,000 biggest websites.[4]

It was first released on May 27, 2003, by Matt Mullenweg[1] as a fork of b2/cafelog. As of February 2011, version 3.0 had been downloaded over 32.5 million times.[5

WordPress is an open source Content Management System (CMS), often used as a blog publishing application, powered by PHP and MySQL. It has many features including a plug-in architecture and a template system. WordPress is used by over 13% of the 1,000,000 biggest websites.[4]

It was first released on May 27, 2003, by Matt Mullenweg[1] as a fork of b2/cafelog. As of February 2011, version 3.0 had been downloaded over 32.5 million times.[5