WordPress Widgets: How to Detect Object-Oriented Programming

If you’ve not read the first post in this series, I recommend it, as we’re starting to get into writing object-oriented code for WordPress through the use of the Widgets API.

The series is going to capture a few things:

  1. show you the basic skeleton of a widget and why it’s object-oriented,
  2. discuss what things you should be able to notice and why
  3. update the Widget Boilerplate directly on this site first and then push it out to GitHub,
  4. build a widget using the API with the boilerplate as the foundation for our work.

But before doing that, I want to make sure that everyone reading this is caught up on the core principles of object-oriented programming and has everything needed to build out an object-oriented solution for WordPress.

To that end, I recommend the following:

  1. Two Pillars of Object-Oriented Programming: Part 1 of 2
  2. Two Pillars of Object-Oriented Programming: Part 2 of 2
  3. Abstract Classes, Part 1 – Abstracting Behavior
  4. Abstract Classes, Part 2 – Abstract Classes and Interfaces
  5. The Independent WordPress Developer

If you’ve read all of that content, great. You’re going to be well-prepared for this post and the upcoming posts. If not, there may be some holes in the rest of what you’re about to read, but the gist of the post should be clear enough.

What’s The Deal, Exactly?

Here’s the thing: Last week, I shared a bit of code along with some information about the Widgets API. I’m going to be revisiting that a little bit more in this post before we get into the more coding intensive part for two reasons:

  1. I want everyone reading this to be on the same page as it relates to writing object-oriented code (at the very least, in this context),
  2. I recognize that people are coming from different backgrounds and I want to make sure we’re all on the same page as much as possible before proceeding.

If you have experience with writing object-oriented code, especially in an advanced capacity, this may seem simpler to you; otherwise, I hope this is going to arm you with everything you need to detect object-oriented practices not only concerning this API but when reading others’ code, too.

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Organizing WordPress Settings Screens with Namespaces

As many of us continue to move forward with PHP7+, we can continue to take advantage of a lot of new features that the language offers.

Organizing WordPress Settings Screens: PHP7

In the meantime, though, there are still features of PHP and related software that we can use t help streamline our development. The least of which (and that which I’ve written and spoken about a bit) is namespaces.

Namespaces and Autoloading in WordPress

Here’s the thing, though: I like to have my plugin’s files and directories structured so that they are organized to mirror that of the namespace conventions they follow. And this can be done for taxonomies, meta boxes, domain objects, database-related functionality and so on.

In this post, though, I want to talk about a way of organizing WordPress settings screens from both the logical – that is, their file system location – and the virtual – that is, their namespaces – organizational structures.

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Using Coding Standards with WordPress

I write a fair amount about coding standards with WordPress and the importance that I believe they have for individuals, teams, and with working with the core application, that being WordPress itself.

Coding Standards with WordPress: The WordPress Coding Standards

In the last year or so, I’ve moved away from working primarily with the WordPress Coding Standards and have begun to use PHP Standard Recommendations for coding.

Coding Standards with WordPress: PSR

Note that I did not say I abandoned the WordPress Coding Standards nor that I elevate the PSR recommendations above them, but I have reasons for when I use each. And for anyone working with WordPress-based projects, I think it’s important to recognize when it’s appropriate to use each.

And that’s the purposes of this post.

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WordPress Widgets: An Object-Oriented Approach

Years ago, I created the WordPress Widget Boilerplate aiming to be the following:

An organized, maintainable boilerplate for building widgets using WordPress best practices.

Since then, not much has changed regarding the Widgets API (which we’ll look at later in this post), but what I consider to be “best practices” has changed. Further, the degree to which I think this API is a solid example of introductory object-oriented programming in WordPress is high.

WordPress Widgets: The Widgets Boilerplate

It’s not because it uses a lot of object-oriented principles, it’s not because it uses modern standards (at least as far as modern PHP is concerned), but because it does use a few things that help us to recognize a few, say, signals regarding object-oriented programming in WordPress.

And this is something that shouldn’t be understated: If you’re looking for examples of object-oriented programming in WordPress, look for APIs that employ it.

Further, if you’re looking for ways to gauge you’re own level of evaluating a piece of code (let alone a code base) for the use of classes and some of the more advanced features of OOP, then why not have some sort of a litmus test to see how you’re doing?

WordPress Widgets: The Widgets API

And the Widgets API does just that.

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What Content is Next for Site Members?

When I set out to create a members-only section of my website, it was to do two things:

  1. provide members with access to high-quality articles for how to approach object-oriented programming in WordPress,
  2. grants discounts to other products and services that I found useful via friends, acquaintances and other services.

Periodically, I do get questions about the content that I’ve produced thus far. If you’re interested in reading the full, detailed list, you can see them here.

Content for Site Members: Members Only Content

But the gist of what I have so far is here:

And that’s the content that I have for site members thus far. But that doesn’t answer the question of what’s next (nor does it answer the question as to why I’ve laid things out the way that I have), so I thought I’d take a post to do that.

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