Good dev citizen

WordCamp Orlando, 2015 - Chad Windnagle

How To BeA Good Developer

Citizen

Quick Intro(disclaimer)

Not a Wordpress Guy

Actually a Joomla, Symfony, Laravel, and

PHP Guy.

8+ Years Working with Joomla & PHP

Now I work with Laravel (and WordPress)

PHP Frameworks

Good* Code

Object Orientation Programming

Documentation

Testing

These are a few of my favorite things.

I want to bring Modern PHP

techniques to WordPress Developers

No! Definitely Not.

Let’s get started

Stop using themes for functionality.

Themes are for Presentation.

Only presentation.

Themes should never

• Touch $wp_query• Change the post content• Change the post title• Change the meta data• Change URL parameter• Change anything except CSS, javascript, and

markup

If your site will not function the same with a different theme, you are

doing it wrong.

“But I need functions.php!”

No you don’t. You need a plugin.

Plugins are easy to build.

Plugins can do everything

functions.php can do.

You can change themes without

affecting plugins, or needing functions.php

My first plugin experience:

Documentation and tutorials are everywhere.

Google Results for Building WordPress

Plugins:

Good PHP coding standards not so

Most information I found:

• Not object oriented• Bad function names• Required Vendor prefixed• Inconsistent Code Style

How to Plugin The Right Way

Have some class

This is an application class.

A few things about this technique

This is not object oriented (not

really).

We keep the vendor prefix only on the

class name.

We put most add_action and

add_filter calls into the constructor.

Now we can do things like this:

Major PHP Wins:• Object oriented code• Reusable Code• Entering into SOLID programming• DRY Methods. • Code that can be extended• Code that can be inherited• Flexible Coding FTW

Why have class?• Clean fast reusable code• Saves time & money• Happy developers & Happy users

Javascript Injection

Use WordPress’ Hook In your Plugin

Class:

Executing Javascript From Markup

Form Submissions

Handle Form Actions with a

Plugin

Error HandlingGracefully

Let’s play catch

Logging?

Code Comprehension

Method Names That Make Sense

Verb-Based Methods:

Good Method Name:get Leads();

Can we do better?

leads_recruitersid | lead_id | recruiter_id1 | 1 | 12 | 2 | 1

Great Method Name:get Lead ById(1)

get Leads ByRecruiter(1)

get Recruiter ByLead(1)

Other ExamplesfindByRecruiter()

addRecruiterToLead()sortRecruitersByLead()

If-Statements

I (proudly) confess…

I haven’t written anelse statement in 2+

years.

My approach is:Validate FirstReturn EarlyProcess Last

2 Levels ofIndentation*

Not counting classes, try & catch, & method body

This will force you to:create more methods (DRY! don’t repeat

yourself)throw more exceptionsdo more error checking

think about code-scenarios less

Nitpicking.

Doc Blocks

Code Style (WP-CS)

php code sniffer

https://github.com/squizlabs/PHP_CodeSniffer

Install phpcsphp code-sniffer

wordpress code sniffer

Fixing PHPCS Errors

Take Away Challenges

• No “else” keyword• 2 levels of indentation• No functionality in themes!

Resources

“Object Oriented Calisthenics”

PHP The Right Way

Thank You!Chad Windnagle

Software EngineerAdvanced Medical

@drmmr763

Credits• “Your Code Sucks, Let’s Fix It” - @rdohms /

doh.ms• PHPCS - SquizLabs

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