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WordPress CMS is one of the most excellent platforms as it has ability to extend its functionality through plug-ins. Through plug-ins, you can simply perform any function to your site as per your business’s needs. We know that developing WordPress plug-in is bit difficult, but WP has excellent solution so get ready to take advantage of building WP plug-in by your own.
As we all know that WordPress development is done in PHP that makes accessible for developers to create plug-ins as they are well-aware of it. Creating plug-ins is one of the easiest tasks as one can have to create a basic file structure and have to use WordPress developed functions and event that helps to create your application.
The File Structure
A single PHP file is developed to create a plug-in; however, you have to create a house of your plug-in within a directory. Started with creating a directory, but you have to make sure to give name that matches with your plug-in. Now, within directory, create the main PHP file and named similar to your plug-in name.
This example has 3 directories, admin, img, and js to hold extra files. With super-plugin-admin.php file, one can get a web interface into plug-in on the WP backend which will be addressed in another post. One can have to add a file named readme.txt at the root of the directory, if they have planned to host plug-in in the WordPress plug-in directory. The format detailed should be followed by the file in this readme.txt example.
Defining Your Plugin
In next step, one can have to define plug-in so that WordPress will identify it and allows it to be installed, removed, and activated. It’s time to open your main plugin file, super-plugin.php and add the given to the top of the file.
Note: You have to replace each line with the data for your plug-in. It is will define your plug-in details for WordPress. Now, you require the Plugin Name: field for the plugin to be identified.
Initializing your program
Now, WordPress knows about the plug-ins, so it is a time to make it do something by using hooks and predefined WordPress functions. A hook is an event listeners that is trigger on the basis of outside events occurring. One can easily tap into the plug-in activation hook for performing any type of setup, such as database table creation.
The function will be executed and script will get registered and queued to be added into the head portion of the HTML when scripts are being loaded up. Lastly, you have to run your program by listening to various WP hooks and waiting for a suitable event that would generate your code to run.
Users can use ‘init’ or ‘wp_loaded’ action, if they want to run your program every time a visitor comes to your site by triggering their code:
One can easily called the super_plugin_init() function on every new request and can also perform any logic he/she wants to in this example. Moreover, you can also add an extra PHP files to develop your application or can also use this initial hook to trigger the full application. Click here to get a full list of the actions that run during a typical request.
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