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WordPress is fast, lightweight, and easy to use. To ensure it stays that way, the Core Teamthinks carefully about adding functionality to the core WordPress code. Still, users often find the need to graft additional functionality into WordPress to meet their needs. This section of the Codex offers guidelines and references for anyone wishing to modify, extend, or contribute to WordPress. The purpose of the WordPress Coding Standards is to create a baseline for collaboration and review within various aspects of the WordPress open source project and community, from core code to themes to plugins. The WordPress community developed the standards contained in this section of the handbook, and those standards are part of the best practices that developers and core contributors are recommended to follow.

Coding standards help avoid common coding errors, improve the readability of code, and simplify modification. They ensure that files within the project appear as if they were created by a single person. Following the standards means anyone will be able to understand a section of code and modify it, if needed, without regard to when it was written or by whom. If you are planning to contribute to WordPress core, you need to familiarize yourself with these standards, as any code you submit will need to comply with them.

  • Plugin Developer Handbook – The best starting place for learning about how to develop plugins
  • WordPress Coding Standards – General information about coding standards for WordPress development
  • Debugging in WordPress – Reference and guide for using the built-in debugging system in WordPress.

The WordPress project is run by a core leadership team and led by co-founder and lead developer Matt Mullenweg. The team governs all aspects of the project, including core development, WordPress.org, and community initiatives. Trusted contributors and core developers earn their stripes on more than their abilities and actions. Leadership roles are earned on the basis of professionalism, personality, attitude, and respect among peers.

The best contributors naturally respect and subscribe to the project’s core philosophies. A lack of a personal agenda is paramount: we’re all a part of the same community and we all share common goals. This doesn’t mean you can’t have an opinion – far from it. The best contributors can balance their opinions with the goals of the project and the perspectives of both users and developers. Offering consistently good suggestions, demonstrating a strong ability to collaborate with others, and being able to accept (and provide) feedback are all important. You can identify these standards in some of our best core contributors, and that’s why they have strong influence over the project. Final decisions are made by the core team, which has evolved over the life of the project based on merit.