Keep your customizations in place, like that driftwood up there
A functionality plugin is a WordPress plugin that is specific to your site, and contains the additional functionality you need your site to have. This is a much better option than adding features to your theme’s functions.php file, because it allows you to change themes at will, yet keep your customizations via the plugin.
WPCandy has a great write-up on creating a functionality plugin and does a great job of explaining why you’d want to use one, and also what kind of things belong in a functionality plugin. Here’s one of my favorite pieces from that WPCandy article:
To decide what belongs in a functions.php file and what belongs in a functionality plugin, think long term. Rather than thinking about how your website will look and behave this week, think about how it will look and behave five years from now. With few exceptions, I bet all of our sites will have new and upgraded themes in five years’ time.
If a feature is theme-specific, such as sidebars or menus, is should go into your functions.php file. If the feature interacts with content of any type, it belongs in a functionality plugin.
Creating The Plugin
This piece is so easy, we’re essentially creating our own WordPress plugin. First, create a new folder called functionality-plugin. Create it inside the plugins folder for your WordPress site.
You can safely use that code as a starting point for your own functionality plugin. Just make sure to save that code in the functionality-plugin folder.
The filename doesn’t matter, just make sure to save it with a
.php extension. Navigate in your web browser to your WordPress Dashboard, go to Plugins, and enable your plugin just like you would any other plugin. That’s it!
Really, most of what I know about functionality plugins came from Ryan Imel and his article at WPCandy, so a LOT of credit is owed to Ryan.
There’s this plugin at WordPress.org, too, called Functionality. It’s essentially a plugin for creating a functionality plugin it looks like, but I’m really not sure. Anybody used it before? Comments are open below.
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