vendor/twig/twig/lib/Twig/Cache/Filesystem.php

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<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Implements a cache on the filesystem.
 *
 * @author Andrew Tch <andrew@noop.lv>
 */
class Twig_Cache_Filesystem implements Twig_CacheInterface
{
    const FORCE_BYTECODE_INVALIDATION = 1;

    private $directory;
    private $options;

    /**
     * @param $directory string The root cache directory
     * @param $options   int    A set of options
     */
    public function __construct($directory, $options = 0)
    {
        $this->directory = rtrim($directory, '\/').'/';
        $this->options = $options;
    }

    public function generateKey($name, $className)
    {
        $hash = hash('sha256', $className);

        return $this->directory.$hash[0].$hash[1].'/'.$hash.'.php';
    }

    public function load($key)
    {
        if (file_exists($key)) {
            @include_once $key;
        }
    }

    public function write($key, $content)
    {
        $dir = dirname($key);
        if (!is_dir($dir)) {
            if (false === @mkdir($dir, 0777, true)) {
                if (PHP_VERSION_ID >= 50300) {
                    clearstatcache(true, $dir);
                }
                if (!is_dir($dir)) {
                    throw new RuntimeException(sprintf('Unable to create the cache directory (%s).', $dir));
                }
            }
        } elseif (!is_writable($dir)) {