custom wordpress plugin development

How to develop a Custom WordPress Plugin from Scratch

Every WordPress site must extract material from the database and display it in a design. And technically, you could operate a theme-only site and nothing else. But without adding plugins, that site would be minimal.

Plugins provide additional functionality to your WordPress site over and above the WordPress core. For example, you may add plugins to your site from a booking calendar or dynamic slider to a full-featured learning management system or online marketplace.

Free WordPress plugins

To add functionality to your website, there are lots of sites you can purchase or download plugins. For example, the WordPress plugin catalog offers hundreds of free plugins to help build the website you need. But if you are seeking additional functionality, a better user interface, or better support, it is worth purchasing premium plugins.

But you may need to write your plugin occasionally! This may be more efficient than utilizing a third-party plugin since you may require just a portion of the code supplied by them. It also means you may create a plugin that fits your requirements more precisely.

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What do you need a plugin?

To create and operate your plugin on your WordPress site, you will need:

  • Editor of code
  • Develop a WordPress installation to test your actual site.

Do not test your plugin until you know it works.

What is in a plugin?

Custom WordPress Plugin

Before you start building your plugin, it is worth knowing what is in a plugin. The exact appearance of the plugin code depends on your plugin: some are tiny, with just one plugin file, while others are huge, with many files, scripts, stylesheets, and template files. And plenty is falling in the center.

  1. The plugin files

The necessary plugin files. It will always be a PHP file, always containing commented-out text telling WordPress about your plugin. This informs WordPress what your plugin does, where to learn more, and who created it. It also provides information about the version number, text domain, and internationalization path, and licensing.

The main plugin file also contains the code to execute the plugin. Sometimes that is all the PHP for the plugin, but for more extensive plugins, there will be requests to include additional code files. This helps you organize your code and means you do not have a lengthy, disorganized file to deal.

  1. Structure of folders

While there are no restrictions on arranging the folders in your plugin, using the same structure that other plugin developers do make sense this will acquaint you with how other plugins are constructed, meaning that sharing your code in the future will make sense to others.

Plugin folders may include:

  • Styles for stylesheets.
  • JavaScript scripts.
  • Includes files included.
  • Plugin files template.
  • Media and other asset files.
  • i18n for internationalization.

You may need to utilize additional directories if your plugin is big or complicated.

  1. Scripts, stylesheets

If your plugin produces material that requires styling, either in the front-end or admin panels, stylesheets may be needed. And if your plugin uses scripts, you will require files.

Keeping them in their folder makes it logical, even if you have one. Then, use a separate function in your main plugin file to enqueue these scripts and stylesheets.

  1. Include archives

If your plugin requires organization, this may be done by dividing your code into several files, called include files. Then, you place these files in your folder and contact them using an include or need function in your main plugin file.

You can keep most of your code in a well-organized file structure while your primary plugin file is slim and simple.

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How to run your plugin code:

When adding code to your plugin, it will not do anything unless you activate it somehow. There are a few ways to start your code or extract WordPress code:

  1. Functions

Functions are WordPress code-building elements. They are the simplest method to start creating your plugins and code faster. You will also find many of them in your theme files.

Each function has its name, followed by braces and code within braces. The code within your plugin will not execute until you call the method.

  1. Action and filtering hooks

By connecting your function to a hook, you execute its code whenever triggered. There are two hooks: action hooks and filter hooks.

The hooks are empty. When WordPress comes to them, it does nothing unless that hook contains a function. Filter hooks include code that will execute without a hooked process.

  1. Classes

Classes are a method to encode more sophisticated features, such as widgets and customizer components, using current WordPress APIs. If you create a class in your plugin, you will usually expand an existing class built into WordPress.


Plugins will turn your website into a complete website that includes advanced features and is secure and robust. Try adding plugins to your site now to discover how you can utilize plugins to enhance your WordPress site. For instance, if you’re looking to create engaging quizzes and surveys on your WordPress site, there are a number of excellent quiz and survey plugins available that can help. Some of the best quiz plugins for WordPress include Quiz Maker, Survey Maker, Easy Form, etc. With the right quiz plugin, you can create engaging personality quizzes that attract new customers and keep existing ones engaged.

Any queries about custom WordPress plugin development? Feel free to fill our contact form to get a free consultation from our experts.

Written by:

Muzammil K

Muzammil K is the Marketing Manager at Aalpha Information Systems, where he leads marketing efforts to drive business growth. With a passion for marketing strategy and a commitment to results, he's dedicated to helping the company succeed in the ever-changing digital landscape.

Muzammil K is the Marketing Manager at Aalpha Information Systems, where he leads marketing efforts to drive business growth. With a passion for marketing strategy and a commitment to results, he's dedicated to helping the company succeed in the ever-changing digital landscape.