Wordpress autoloading

README.md

Yes i know Composer is a thing,

Yes i know it's autoloader is freaking amazing,

Yes i'm well aware it would be much simpler to use the composer autoloader.

However, If you're submitting your plugin/theme to wordpress.org for review they get a bit uppity about using composer's autoloader sometimes.

It's also worth keeping in mind that not everyone running wp has shell access for interacting with composer.

Redistributing vendor directories is a pain in the backside as well, so go easy on the packages.

autoload.php

<?php

namespace Vendor\PackageName;

spl_autoload_register(function($class)
{
    if(false !== strpos($class, 'PackageName'))
    {
        $parts = explode('\\', $class);
        $targetFile = "";
    
        if(count($parts) == 3)
        {
            $targetFile = $parts[2];
        }
    
        /**
         * If we're not at the last position in the array
         * append the section of the namespace with a trailing slash,
         * Otherwise just add the section.
         *
         * This allows us to use multi-level namespaces to break out
         * our classes into multiple directories.
         */
        if(count($parts) > 3)
        {
            for($i = 2; $i <= count($parts) - 1; $i++)
            {
                if($i < (count($parts) - 1))
                {
                    $targetFile .= $parts[$i] . '/';
                }
                else
                {
                    $targetFile .= $parts[$i];
                }
            }
        }

        /**
         * Adjust this path to where you'll be keeping your classes
         */
        $basePath = __DIR__ . '/src/php/';
        if(file_exists($basePath . $targetFile . '.php'))
        {
            include_once $basePath . $targetFile . '.php';
        } 
        else
        {
            include_once $basePath . strtolower($targetFile) . '.php';
        }
    }

});

index.php

<?php

/*
Plugin Name: My Plugin Name
Descrpition: Does some stuff, Occasionally some things too
Version: 0.0.0
Author: Me
Author URI: https://myname.me
*/

// Require the autoloader file for sanity preservation purposes
require('autoload.php');