PHP: Autoloading PSR-4

• https://enterprise-level-php.com/2017/12/25/the-magic-behind-autoloading-php-files-using-composer.html

Every time you will try to find a Class with Namespace starting with “Christmas”, look into the “src/Christmas” directory.

{
    "name": "enterprise-php/composer-autoloading",
    "description": "An example how Composer works behind the scenes.",
    "type": "project",
    "authors": [
        {
            "name": "Lukas Lukac",
            "email": "services@trki.sk"
        }
    ],
    "require": {},
    "autoload": {
        "psr-4": {
            "Christmas\\": "src/Christmas"
        }
    }
}

Once again, after running composer dump-autoload you will get a new Hash like structured file autoload_psr4.php:

<?php

// /ComposerAutoloading/vendor/composer/autoload_psr4.php

// autoload_psr4.php @generated by Composer

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname($vendorDir);

return array(
    'Christmas\\' => array($baseDir . '/src/Christmas'),
);