Security

dhtmlxConnector is open to external access of another programs and any external user is allowed to change data in database.
Thus, adding some kind of session-based authentication is strongly recommended.
Built-in security manager allows to limit connector for certain operations.

$gridConn->access->deny("read"); //blocks Select action
$gridConn->access->deny("insert"); //blocks Insert action
$gridConn->access->deny("update"); //blocks Update action
$gridConn->access->deny("delete"); //blocks Delete action

By default, connector allows all operations.