Sometimes you just can’t find a pre-built widget that does exactly what you want, when you run into this scenario, your best bet is to build something from scratch. This tutorial will is an answer to “How do I build a custom WordPress widget?“.

WordPress widgets are objects that have several required parts:

  1. Constructor (__construct) – actions to take when the widget is first created like enqueueing javascript or stylesheet files.
  2. Front-end  (widget) – the widget’s HTML output
  3. Back-end (form) – the form for the widget’s edit interface in the Admin section
  4. Update (update) – catches the form submission from the back-end form, updating the database

The easiest way to add a custom widget type to your theme is to build a class that looks something like this:

To embed this widget type into your own custom theme, just include this php in your functions.php

To add this widget type to your custom plugin, include this code in a standard plugin file.