+ /**
+ * @brief Returns the MySQL server version string
+ *
+ * This function discriminate between the deprecated mysql API and the current
+ * object-oriented mysqli API. Example of returned string: 5.5.46-0+deb8u1
+ *
+ * @return string
+ */
+ public function server_info() {
+ if ($this->mysqli) {
+ $return = $this->db->server_info;
+ } else {
+ $return = mysql_get_server_info($this->db);
+ }
+ return $return;
+ }
+