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When building your plugin, it's important to think about how your files should be organized. While you can change some things around later, getting started with a solid structure will make it easier to build out the plugin's features in the long run.

The most important and only required file for any plugin to have is its primary PHP file. This file can be named anything and must sit in the root of your plugin folder. If your primary file is named plugin.php, it will be located at /super‐duper‐forums/plugin.php.

There are two common practices for naming the primary plugin file. Many plugin authors name this file the same as the folder, such as super‐duper‐forums.php. The less‐common practice is to simply name this plugin.php. You may decide to choose something else entirely. Over time as you develop plugins, you'll likely want to have a standard naming scheme that best suits you or your team.

In modern plugin development, you'll most likely have JavaScript build tools, config files, and all sorts of other files that take up space in the root of your plugin folder. Putting all your plugin files in the root will likely clutter things and make it hard to find things. It's best to only keep your primary plugin file in the root and all other plugin code within subfolders. The exception to this rule would be the uninstall.php file (see the “Uninstall.php” section later in this chapter).