<?php use Composer\Autoload\ClassLoader; function includeIfExists(string $file): ?ClassLoader { if (file_exists($file)) { return include $file; } return null; } if ((!$loader = includeIfExists(__DIR__ . '/../vendor/autoload.php')) && (!$loader = includeIfExists(__DIR__ . '/../../../autoload.php'))) { die('You must set up the project dependencies, run the following commands:'.PHP_EOL. 'curl -s http://getcomposer.org/installer | php'.PHP_EOL. 'php composer.phar install'.PHP_EOL); } return $loader;