|Initial release||May 27, 2003|
|Stable release||6.2.2 / May 20, 2023|
Content management software
|License(s)||GNU General Public License v2|
WordPress is a free open-source blogging tool and content management system (CMS) based on PHP and MySQL. It has many features including a plug-in architecture and a template system. WordPress is used by over 14.7% of Alexa Internet's "top 1 million" websites and as of August 2011 manages 22% of all new websites. WordPress is currently the most popular CMS in use on the Internet.
b2/cafelog, more commonly known as simply b2 or cafelog, was the precursor to WordPress. b2/cafelog was estimated to have been employed on approximately 2,000 blogs as of May 2003. It was written in PHP for use with MySQL by Michel Valdrighi, who is now a contributing developer to WordPress. Although WordPress is the official successor, another project, b2evolution, is also in active development.
WordPress first appeared in 2003 as a joint effort between Matt Mullenweg and Mike Little to create a fork of b2. The name WordPress was suggested by Christine Selleck Tremoulet, a friend of Mullenweg.
In 2004 the licensing terms for the competing Movable Type package were changed by Six Apart, and many of its most influential users migrated to WordPress. By October 2009, the Open Source CMS Market Share Report reached the conclusion that WordPress enjoyed the greatest brand strength of any open source content management system.
Most WordPress releases are codenamed after well-known jazz musicians, starting after version 1.0.
|Version||Code name||Release date||Notes|
|0.70||none||27 May 2003||Used the same file structure as its predecessor, b2/cafelog, and continued the numbering from its last release, 0.6. Only 0.71-gold is available for download in the official WordPress Release Archive page.|
|1.2||Mingus||22 May 2004||Added support of plugins; which same identification headers are used unchanged in WordPress releases as of 2011.|
|1.5||Strayhorn||17 February 2005||Added a range of vital features, such as ability to manage static pages and a template/theme system. It was also equipped with a new default template (code named Kubrick) designed by Michael Heilemann.|
|2.0||Duke||31 December 2005||Added rich editing, better administration tools, image uploading, faster posting, improved import system, fully overhauled the back end, and various improvements to plugin developers.|
|2.1||Ella||22 January 2007||Corrected security issues, redesigned interface, enhanced editing tools (including integrated spell check and auto save), and improved content management options.|
|2.2||Getz||16 May 2007||Added widget support for templates, updated Atom feed support, and speed optimizations.|
|2.3||Dexter||24 September 2007||Added native tagging support, new taxonomy system for categories, and easy notification of updates, fully supports Atom 1.0, with the publishing protocol, and some much needed security fixes.|
|2.5||Brecker||29 March 2008||Version 2.4 was skipped, so version 2.5 added two releases worth of new code. The administration interface was fully redesigned, and the WordPress website to match the new style.|
|2.6||Tyner||15 July 2008||Added new features that made WordPress a more powerful CMS: it can now track changes to every post and page and allow easy posting from anywhere on the web.|
|2.7||Coltrane||11 December 2008||Administration interface redesigned fully, added automatic upgrades and installing plugins, from within the administration interface.|
|2.8||Baker||10 June 2009||Had improvements in speed, added automatic installing of themes from within administration interface, introduces the CodePress editor for syntax highlighting and a redesigned widget interface.|
|2.9||Carmen||19 December 2009||Added global undo, built-in image editor, batch plugin updating, and many less visible tweaks.|
|3.0||Thelonious||17 June 2010||Added a new theme application programming interfaces (API); the merge of WordPress and WordPress MU, creating the new multi-site functionality, a new default theme called "Twenty Ten", and many less visible tweaks.|
|3.1||Reinhardt||23 February 2011||Added the Admin Bar, which is displayed on all blog pages when an admin is logged in, and Post Format, best explained as a Tumblr like micro-blogging feature. It provides easy access to many critical functions, such as comments and updates. Includes internal linking abilities, a newly streamlined writing interface, and many other changes.|
|3.2||Gershwin||04 July 2011||Focused on making WordPress faster and lighter. Released only four months after version 3.1, reflecting the growing speed of development in the WordPress community.|
|3.3||Sonny||12 December 2011||Focused on making WordPress friendlier for beginners and tablet computer users.|
|3.4||Green||13 June 2012||Focused on improvements to theme customization, Twitter integration and several minor changes.|
|3.5||Elvin||11 December 2012||Support for the retina display, color picker, new theme: Twenty Twelve, improved image workflow |
|3.6||Oscar||01 August 2013||New theme: Twenty Thirteen; Admin enhancements: post formats UI update, menus UI improvements, revisions update, autosave and post locking|
|3.7||Basie||24 October 2013||Automatically apply maintenance and security updates in the background; Stronger password recommendations; Support for automatically installing the right language files and keeping them up to date|
|3.8||Parker||12 December 2013||Improved admin interface; Responsive design for mobile devices; New typography using Open Sans; Admin color schemes; Redesigned theme management interface; Simplified main dashboard; Twenty Fourteen magazine style default theme; Second release using "plugin-first development process"|
|3.9||Smith||16 April 2014||Live widget previews; New theme installer; UI refinements when working with media; Advanced display settings for images|
|4.0||Benny||4 September 2014||Improved media management, embeds, writing interface, and plugin discovery.|
|4.1||Dinah||18 December 2014||Twenty Fifteen as the new default theme, distraction-free writing, easy language switch, Vine embeds and plugin recommendations.|
|4.2||Powell||23 April 2015||New "Press This" features, improved characters support, emoji support, improved customizer, new embeds and updated plugin system.|
|4.3||Billie||18 August 2015||Focus on mobile experience, better passwords and improved customizer.|
|4.4||Clifford||08 December 2015||"New features in 4.4 make your site more connected and responsive." Includes new Twenty Sixteen theme, responsive images, and improved embeds.|
|4.5||Coleman||12 April 2016||"New features in 4.5 help streamline your workflow, whether you’re writing or building your site." Includes improved inline linking, embed templates, custom logo support, and image resizing.|
|4.6||Pepper||16 August 2016||"New features in 4.6 help you to focus on the important things while feeling more at home." Includes improved plugin and theme updates, font support, editor, and performance.|
|4.7||Vaughan||06 December 2016||"New features in 4.7 help you get your site set up the way you want it." Includes new Twenty Seventeen theme, theme starter tools, and REST API content endpoints.|
|4.8||Evans||08 June 2017||"New features in 4.8 add more ways for you to express yourself and represent your brand." Includes improvements to links, media widgets, text widgets, and WP newsfeed.|
|4.9||Tipton||16 November 2017||"New features in 4.9 will smooth your design workflow and keep you safe from coding errors." Includes improvements to contributor workflow management, code syntax highlighting, and error checking.|
|5.0||Bebo||06 December 2018||"Our new block-based editor is the first step toward an exciting new future with a streamlined editing experience across your site." Also includes "Twenty Nineteen, a new default theme that shows off the power of the new editor."|
|5.1||Betty||21 February 2019||"5.1 focuses on polish, in particular by improving the overall performance of the editor. In addition, this release paves the way for a better, faster, and more secure WordPress with some essential tools for site administrators and developers."|
|5.2||Jaco||07 May 2019||"New features in this update make it easier than ever to fix your site if something goes wrong. There are even more robust tools for identifying and fixing configuration issues and fatal errors."|
|5.3||Kirk||12 November 2019||"New features in the editor increase design freedoms, provide additional layout options and style variations to allow designers more control over the look of a site. This release also introduces the Twenty Twenty theme giving the user more design flexibility and integration with the block editor."|
|5.4||Adderley||31 March 2020||"More ways to make your pages come alive. With easier ways to get it all done and looking better than ever—and boosts in speed you can feel."|
|5.5||Eckstine||11 August 2020||"[Y]our site gets new power in three major areas: speed, search, and security."|
|5.6||Simone||08 December 2020||"WordPress 5.6 brings you countless ways to set your ideas free and bring them to life. With a brand-new default theme as your canvas, it supports an ever-growing collection of blocks as your brushes. Paint with words. Pictures. Sound. Or rich embedded media."|
|5.7||Esperanza||09 March 2021||"With this new version, WordPress brings you fresh colors. The editor helps you work in a few places you couldn’t before without getting into code or hiring a pro. The controls you use most are right where you need them. Layout changes that should be simple, are even simpler to make."|
|5.8||Tatum||20 July 2021||This release introduced block widget management and improved block widget editing, workflow management tools, and Global Styles and Global Settings APIs.|
|5.9||Joséphine||25 January 2022||This release introduced whole site editing, a default block theme, site navigation blocks, and better block controls.|
|6.0||Arturo||24 May 2022||This release enhances the writing experience, expands the new Style system, improves the list view, improves performance speed, adds more template choices, and adds additional design tools.|
|6.1||Misha||01 November 2022||"Inside WordPress 6.1 you’ll interact with enhancements that continue to make site creation more intuitive while pushing your creative boundaries further than ever."|
|6.2||Dolphy||29 March 2023||"This latest version of WordPress reimagines your site editing experience, introduces more ways to style your site, and offers a new distraction-free way to write. Discover improvements that give you more control and freedom to express your creative vision."|
Primary functions of WordPress include:
- W3C compliance
- no rebuilding/regeneration
- static pages
- internal links
- theme support
- cross-blog communication
- comment support and control
- spam protection
- built-in user registration system
- granular post security
- user-based security
- import support
- XML-RPC interface
- typographical XHTML conversion
- intelligent text formatting
- bookmarklet support
- Ping-O-Matic support
The the latest versions of Wordpress:
- PHP version 7.4 or greater
- MySQL version 5.6 or greater -or- MariaDB version 10.1 or greater
For older versions of Wordpress:
- PHP version 5.2.4 or greater
- MySQL version 5.0 or greater
Additional requirement information can be found here.
Videos, screenshots, and other media
Screenshots of WordPress can be found on the website.
An online demo of WordPress is located at OpenSource CMS.
Entities using WordPress
Examples of entities using WordPress include:
Administrative Council of the United States, Adobe, Barnsley Hospital NHS Foundation Trust, Ben and Jerry's, Cookies for Kids' Cancer, Crossover Health, CURE International, Forbes, Ford Motor Company, General Electric, ILiveWithADisability.com, Intellectual Ventures Lab, Library of Congress, LIVESTRONG, Nokia, OpenView Labs, Ovarian Cancer National Alliance, Philips, Portuguese Office of the High Commissioner for Health, ResearchWorks, Samsung, The Nieman Journalism Lab at Harvard University, The University Of British Columbia, University of Arkansas at Little Rock, University of Missouri College of Engineering,
A full directory of WordPress users can be found at the WordPress website.
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