I will be honest I absolutely love wordpress; so I wanted to highlight a series by Devlounge titled How to Write a WordPress Plugin. I haven’t got through that whole thing yet but I wanted to get this out there so others can see it. Here is the info they provided:

Who is this Series For?

This series is for any WordPress user who is curious about or wants to learn how to write their own WordPress plugin. Readers of this series will have an intermediate knowledge of PHP, know a little JavaScript, and be decent at Cascading Style Sheets.

This plugin series will benefit theme designers, those that like to tinker with plugin code, and those that are interested in writing their own plugin from scratch.

Table of contents for How to Write a WordPress Plugin

1. How to Write a WordPress Plugin – Introduction
2. Seven Reasons to Write a WordPress Plugin
3. How to Get Ideas for Wordpress Plugins
4. Structure of a Wordpress Plugin
5. WordPress Plugin Actions
6. WordPress Plugin Filters
7. Constructing a WordPress Plugin Admin Panel
8. Constructing a WordPress Plugin User’s Panel
9. WordPress Plugins and Database Interaction
10. Using JavaScript and CSS with your WordPress Plugin
11. Using AJAX with your WordPress Plugin
12. Releasing and Promoting Your WordPress Plugin