<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\CacheWarmer;
/**
* Interface for classes that support warming their cache.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
interface WarmableInterface
{
/**
* Warms up the cache.
*
* @param string $cacheDir Where warm-up artifacts should be stored
* @param string|null $buildDir Where read-only artifacts should go; null when called after compile-time
*
* @return string[] A list of classes or files to preload on PHP 7.4+
*/
public function warmUp(string $cacheDir /* , string $buildDir = null */);
}