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 $time
     *   The time service.
     */
    public function __construct(CacheTagsChecksumInterface $checksum_provider, TimeInterface $time) {
        $this->checksumProvider = $checksum_provider;
    }
    
    /**
     * 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);
    }

}