class PhpFileCache

PhpFileCacheTest.php in drupal/core/vendor/doctrine/common/tests/Doctrine/Tests/Common/Cache/PhpFileCacheTest.php

class PhpFileCache extends FileCache {
  const EXTENSION = '.doctrinecache.php';

  /**
   * {@inheritdoc}
   */
  protected $extension = self::EXTENSION;

  /**
   * {@inheritdoc}
   */
  protected function doFetch($id) {
    $filename = $this
      ->getFilename($id);
    if (!file_exists($filename)) {
      return false;
    }
    $value = (include $filename);
    if ($value['lifetime'] !== 0 && $value['lifetime'] < time()) {
      return false;
    }
    return $value['data'];
  }

  /**
   * {@inheritdoc}
   */
  protected function doContains($id) {
    $filename = $this
      ->getFilename($id);
    if (!file_exists($filename)) {
      return false;
    }
    $value = (include $filename);
    return $value['lifetime'] === 0 || $value['lifetime'] > time();
  }

  /**
   * {@inheritdoc}
   */
  protected function doSave($id, $data, $lifeTime = 0) {
    if ($lifeTime > 0) {
      $lifeTime = time() + $lifeTime;
    }
    if (is_object($data) && !method_exists($data, '__set_state')) {
      throw new \InvalidArgumentException("Invalid argument given, PhpFileCache only allows objects that implement __set_state() " . "and fully support var_export(). You can use the FilesystemCache to save arbitrary object " . "graphs using serialize()/deserialize().");
    }
    $filename = $this
      ->getFilename($id);
    $filepath = pathinfo($filename, PATHINFO_DIRNAME);
    if (!is_dir($filepath)) {
      mkdir($filepath, 0777, true);
    }
    $value = array(
      'lifetime' => $lifeTime,
      'data' => $data,
    );
    $value = var_export($value, true);
    $code = sprintf('<?php return %s;', $value);
    return file_put_contents($filename, $code);
  }

}