Load cache programmatically

Development
1

Magento 1.x code

Mage::app()->getCacheInstance()->load($cacheKey);

Magento 2 code

/**
 * @param string $key
 * @return string|false
 */
function df_cache_load($key) {
	/** @var \Magento\Framework\ObjectManagerInterface $om */
	$om = \Magento\Framework\App\ObjectManager::getInstance();
	/** @var \Magento\Framework\App\CacheInterface $cache */
	$cache = $om->get('Magento\Framework\App\CacheInterface');
	return $cache->load($key);
}