OpenCart 🇺🇦

if ($data) {
	$sql = "SELECT * FROM " . DB_PREFIX . "tax_class";

	$sql .= " ORDER BY title";	

	if (isset($data['order']) && ($data['order'] == 'DESC')) {
		$sql .= " DESC";
	} else {
		$sql .= " ASC";
	}

	if (isset($data['start']) || isset($data['limit'])) {
		if ($data['start'] < 0) {
			$data['start'] = 0;
		}					

		if ($data['limit'] < 1) {
			$data['limit'] = 20;
		}	

		$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
	}

	$query = $this->db->query($sql);

	return $query->rows;		
} else {
	$tax_class_data = $this->cache->get('tax_class');

	if (!$tax_class_data) {
		$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "tax_class");

		$tax_class_data = $query->rows;

		$this->cache->set('tax_class', $tax_class_data);
	}

	return $tax_class_data;			
}