xpressengine / xe-core

	 * 								If stored time is older then modified time, return false.

	 * @return false|mixed Return false on failure or older then modified time. Return the string associated with the $key on success.

	 */

	function get($key, $modified_time = 0)

	{

		if(!$this->handler)

		{

			return false;

		}

		$key = $this->getCacheKey($key);

		return $this->handler->get($key, $modified_time);

	}

	/**

	 * Put data into cache

	 * @param string $key Cache key

	 * @return void

	 */

	function delete($key)

	{

		if(!$this->handler)

		{

			return false;

		}

		$key = $this->getCacheKey($key);

		return $this->handler->delete($key);

	}

	/**

	 * Return whether cache is valid or invalid

	 * 								If stored time is older then modified time, the data is invalid.

	 * @return bool Return true on valid or false on invalid.

	 */

	function isValid($key, $modified_time = 0)

	{

		if(!$this->handler)

		{

			return false;

		}

		$key = $this->getCacheKey($key);

		return $this->handler->isValid($key, $modified_time);

	}

	/**

	 * Truncate all cache