PhpBackendFactory.php

<?php

namespace Drupal\Core\Cache;

use Drupal\Component\Datetime\TimeInterface;
class PhpBackendFactory implements CacheFactoryInterface {
    
    /**
     * The cache tags checksum provider.
     *
     * @var \Drupal\Core\Cache\CacheTagsChecksumInterface
     */
    protected $checksumProvider;
    
    /**
     * Constructs a PhpBackendFactory object.
     *
     * @param \Drupal\Core\Cache\CacheTagsChecksumInterface $checksum_provider
     *   The cache tags checksum provider.
     * @param \Drupal\Component\Datetime\TimeInterface|null $time
     *   The time service.
     */
    public function __construct(CacheTagsChecksumInterface $checksum_provider, ?TimeInterface $time = NULL) {
        $this->checksumProvider = $checksum_provider;
        if (!$time) {
            @trigger_error('Calling ' . __METHOD__ . '() without the $time argument is deprecated in drupal:10.3.0 and it will be required in drupal:11.0.0. See https://www.drupal.org/node/3387233', E_USER_DEPRECATED);
            $this->time = \Drupal::service(TimeInterface::class);
        }
    }
    
    /**
     * Gets PhpBackend for the specified cache bin.
     *
     * @param $bin
     *   The cache bin for which the object is created.
     *
     * @return \Drupal\Core\Cache\PhpBackend
     *   The cache backend object for the specified cache bin.
     */
    public function get($bin) {
        return new PhpBackend($bin, $this->checksumProvider, $this->time);
    }

}