# PHP

Tool · [Standard tools and platforms](https://ecosystem.samcarlton.com/tools)

Also called: P H P, PHP code

A [programming language](https://ecosystem.samcarlton.com/tech-stack) for building websites on the [server](https://ecosystem.samcarlton.com/server). [WordPress](https://ecosystem.samcarlton.com/wordpress) and many older [web apps](https://ecosystem.samcarlton.com/web-app-mobile-app) are written in it.

**For example:** A [developer](https://ecosystem.samcarlton.com/software-engineer) edits the PHP in a [WordPress](https://ecosystem.samcarlton.com/wordpress) theme to add a custom field to every product page.

Official site: <https://www.php.net>

## Connects to (4)

- [Tech stack](https://ecosystem.samcarlton.com/tech-stack): The set of programming languages and tools a product is built with.
- [Back end](https://ecosystem.samcarlton.com/back-end): The part of an app that runs out of sight on a server.
- [WordPress](https://ecosystem.samcarlton.com/wordpress): Free, open-source software for building and running websites and blogs, used by a large share of the web.
- [Server](https://ecosystem.samcarlton.com/server): A computer that stays on and connected to the internet so it can run your app and answer requests from people's phones and browsers.

Map view: https://ecosystem.samcarlton.com/php