system/Cache/Handlers/PredisHandler.php
public function getMetaData(string $key)
	{
		$data = array_combine(['__ci_value'], $this->redis->hmget($key, ['__ci_value']));

		if (isset($data['__ci_value']) && $data['__ci_value'] !== false)
		{
			return [
				'expire' => time() + $this->redis->ttl($key),
				'data'   => $data['__ci_value'],
			];
		}

		return false;
	}
public function getMetaData(string $key)
	{
		$data = array_combine(['__ci_value'], $this->redis->hmget($key, ['__ci_value']));

		if (isset($data['__ci_value']) && $data['__ci_value'] !== false)
		{
			return [
				'expire' => time() + $this->redis->ttl($key),
				'data'   => $data['__ci_value'],
			];
		}

		return false;
	}
Returns detailed information about the specific item in the cache.

@param string $key Cache item name.

@return mixed