Modx (PHP)

on the site (also MODx Evo) to refine the regular authorization and make pars output of information in LK. Refining the authorization - there is a base in XML, it - a list of customers. The client has his own unique number (INN). When registering - check on the presence of the number. If OK - registration, if not - Alert.
Pars two XML with the same structure with the addition of dials (in the data - the volume of purchases and the accrual of bonus points) and the conclusion of this information in the clients office.