WordPress by Matthew MacDonald

Author:Matthew MacDonald
Language: eng
Format: epub
Publisher: O'Reilly Media
Published: 2020-09-14T15:38:40+00:00

How Plugins Work

Technically, a plugin is a small program written in the same programming language that runs the entire WordPress system, PHP.

Plugins work by inserting themselves into various WordPress operations. For example, before WordPress displays a post, it checks to see if you've installed any plugins related to displaying posts. If you have, WordPress calls your plugin into action. This sort of check is called a hook, and WordPress has a long list of hooks that can launch different plugins at different times. A WordPress page can also use a special code, called a template tag, to ask a plugin to insert something in a specific place. But either way, the interaction between a WordPress site and its plugins happens behind the scenes, without your intervention.

Note If you want to learn more about the way plugins work, you can check out the WordPress guidelines for plugin authors http://tinyurl.com/write-plugin. But a hefty disclaimer applies—while we encourage learning about plugin building, we don't suggest you try to make one of your own for a real public website. There are too many little ways to cause big problems that will affect the security and performance of your site.

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