WordPress（ WordPress.org ）Is a free open source content management system (CMS) based on PHP and mysql. The functions include plug-in architecture and template system. It's most connected to blogs, but supports other types of web content, including more traditional mailing lists and forums, media libraries, and online stores. As of April 2019, WordPress has been used by more than 60 million websites, including 33.6% of the top 10 million websites. WordPress is currently the most popular website management system. WordPress has also been used in other application areas, such as pervasive display systems (PDS).

Matt mattlenlenweg and Mike little, the founders of WordPress, released B2 / cafelog on May 27, 2003. The software is licensed under gplv2 (or later).

To function properly, WordPress must be installed on a web server that must be WordPress.com Part of an Internet hosted service like, or to run WordPress.org The package's computer can be used as a network host alone. The local computer can be used for single user testing and learning purposes.

"WordPress is the factory that makes web pages" is a core analogy to illustrate what WordPress does. It stores your content and allows you to create and publish web pages that only need domains and managed sites to work.

WordPress has a web template system that uses a template processor. Its architecture is a front-end controller that routes all requests for non static URIs to a single PHP file that parses the URIs and identifies the target page. This allows for more human readable permanent links.

WordPress users can install and switch between different themes. Themes allow users to change the look and function of WordPress sites without changing core code or site content. Every WordPress website needs to display at least one theme, and each theme should be designed using WordPress standard, structured PHP, effective HTML (Hypertext Markup Language) and cascading style sheets (CSS). You can use the WordPress appearance management tool in the dashboard to install the theme directly, or you can copy the theme folder directly to the theme directory, for example through FTP. You can directly modify the PHP, HTML and CSS contained in the theme to change the theme behavior, or the theme can be a "sub" theme, which can inherit the settings of another theme and selectively override the function. WordPress Themes are usually divided into two categories: free and advanced. Many free themes are listed in the WordPress Themes catalog, and advanced themes can be purchased from the marketplace and WordPress developers. WordPress users can also create and develop their own custom themes. Under scores, a free theme created by WordPress developers, has become a popular foundation for new themes.

WordPress's plug-in architecture allows users to extend the functionality of a website or blog. As of February 2019, WordPress.org There are 54402 plug-ins available. Each plug-in provides custom functions and features, enabling users to customize their website according to their specific needs. However, this does not include the advanced plug-ins available (about 1500 plus), which may not be available in the WordPress.org Listed in the repository. These customizations range from search engine optimization to client portals for displaying private information to log in users, content management systems, and content display features such as adding widgets and navigation bars. Not all available plug-ins are always in line with upgrades, so they may not work properly or at all. Most plug-ins are available through WordPress itself by downloading them and installing files manually through FTP or through the WordPress dashboard. However, many third parties provide plug-ins through their own websites, many of which are paid packages.

Web developers who want to develop plug-ins need to learn about WordPress's hook system, which consists of more than 300 hooks and is divided into two categories: action hook and filter hook.

B2 / cafelog (usually called B2 or cafelog) is the predecessor of WordPress. As of May 2003, it is estimated that B2 / cafelog has been installed on about 2000 blogs. [27] it's written in PHP and used with MySQL by Michel valdrighi, who is now an important developer of WordPress. Although WordPress is the official successor, another project, b2evolution, is also under active development.

WordPress first appeared in 2003 as a B2 branch created by Matt Mullenweg and Mike little. Christine Selleck tremoulet, a friend of Mullenweg, recommends WordPress.

In 2004, six apart changed the license terms of the competitive movable type package, causing many of its most influential users to migrate to WordPress. By October 2009, the open source cms market share report concluded that WordPress has the biggest brand advantage of all open source content management systems.

As of February 2017, WordPress accounted for 58.7% of all websites with known content management systems. This is 27.5% of the top 10 million websites.