OpenCart 🇺🇦

$sql = "SELECT *, (SELECT agd.name FROM " . DB_PREFIX . "attribute_group_description agd WHERE agd.attribute_group_id = a.attribute_group_id AND agd.language_id = '" . (int)$this->config->get('config_language_id') . "') AS attribute_group FROM " . DB_PREFIX . "attribute a LEFT JOIN " . DB_PREFIX . "attribute_description ad ON (a.attribute_id = ad.attribute_id) WHERE ad.language_id = '" . (int)$this->config->get('config_language_id') . "'";

if (!empty($data['filter_name'])) {
	$sql .= " AND ad.name LIKE '" . $this->db->escape($data['filter_name']) . "%'";
}

if (!empty($data['filter_attribute_group_id'])) {
	$sql .= " AND a.attribute_group_id = '" . $this->db->escape($data['filter_attribute_group_id']) . "'";
}

$sort_data = array(
	'ad.name',
	'attribute_group',
	'a.sort_order'
);	

if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
	$sql .= " ORDER BY " . $data['sort'];	
} else {
	$sql .= " ORDER BY attribute_group, ad.name";	
}	

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;