LSS Private Limited covers a variety of topics — everything from what should be in the plugin header, to security best practices, to tools you can use to build your plugin. It’s also a work in progress — if you find something missing or incomplete, please edit and make it better.
There are three major components to WordPress:
Core Themes Plugins
This handbook is about plugins and how they interact with WordPress. It will help you understand how they work and how to create your own.
Why We Make Plugins
If there’s one cardinal rule in WordPress development, it’s this: Don’t touch WordPress core. This means that you don’t edit core WordPress files to add functionality to your site. This is because, when WordPress updates to a new version, it overwrites the local files. Any functionality you want to add should be added through plugins using approved WordPress APIs.
WordPress plugins can be as simple or as complicated as you need them to be, depending on what you want to do. The simplest plugin is a single PHP file. The Hello Dolly plugin is an example of such a plugin. The plugin PHP file just needs a Plugin Header, a couple of PHP functions, and some hooks to attach your functions to.
Plugins allow you to greatly extend the functionality of WordPress without touching WordPress core itself.
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