Исходный код метода:
if ($data) {
$sql = "SELECT * FROM " . DB_PREFIX . "voucher_theme vt LEFT JOIN " . DB_PREFIX . "voucher_theme_description vtd ON (vt.voucher_theme_id = vtd.voucher_theme_id) WHERE vtd.language_id = '" . (int)$this->config->get('config_language_id') . "' ORDER BY vtd.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;
} else {
$voucher_theme_data = $this->cache->get('voucher_theme.' . (int)$this->config->get('config_language_id'));
if (!$voucher_theme_data) {
$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "voucher_theme vt LEFT JOIN " . DB_PREFIX . "voucher_theme_description vtd ON (vt.voucher_theme_id = vtd.voucher_theme_id) WHERE vtd.language_id = '" . (int)$this->config->get('config_language_id') . "' ORDER BY vtd.name");
$voucher_theme_data = $query->rows;
$this->cache->set('voucher_theme.' . (int)$this->config->get('config_language_id'), $voucher_theme_data);
}
return $voucher_theme_data;
}