OpenCart 🇺🇦

$sql = "SELECT *, CONCAT(c.firstname, ' ', c.lastname) AS name, cg.name AS customer_group FROM " . DB_PREFIX . "customer c LEFT JOIN " . DB_PREFIX . "customer_group cg ON (c.customer_group_id = cg.customer_group_id) ";

$implode = array();

if (isset($data['filter_name']) && !is_null($data['filter_name'])) {
	$implode[] = "LCASE(CONCAT(c.firstname, ' ', c.lastname)) LIKE '" . $this->db->escape(utf8_strtolower($data['filter_name'])) . "%'";
}

if (isset($data['filter_email']) && !is_null($data['filter_email'])) {
	$implode[] = "LCASE(c.email) = '" . $this->db->escape(utf8_strtolower($data['filter_email'])) . "'";
}

if (isset($data['filter_customer_group_id']) && !is_null($data['filter_customer_group_id'])) {
	$implode[] = "cg.customer_group_id = '" . $this->db->escape($data['filter_customer_group_id']) . "'";
}	

if (isset($data['filter_status']) && !is_null($data['filter_status'])) {
	$implode[] = "c.status = '" . (int)$data['filter_status'] . "'";
}	

if (isset($data['filter_approved']) && !is_null($data['filter_approved'])) {
	$implode[] = "c.approved = '" . (int)$data['filter_approved'] . "'";
}	

if (isset($data['filter_ip']) && !is_null($data['filter_ip'])) {
	$implode[] = "c.customer_id IN (SELECT customer_id FROM " . DB_PREFIX . "customer_ip WHERE ip = '" . $this->db->escape($data['filter_ip']) . "')";
}	

if (isset($data['filter_date_added']) && !is_null($data['filter_date_added'])) {
	$implode[] = "DATE(c.date_added) = DATE('" . $this->db->escape($data['filter_date_added']) . "')";
}

if ($implode) {
	$sql .= " WHERE " . implode(" AND ", $implode);
}

$sort_data = array(
	'name',
	'c.email',
	'customer_group',
	'c.status',
	'c.ip',
	'c.date_added'
);	

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