Convert mysqli connection and registration / login to PDO, quick job for ppl who know pdo.

Hello! I'd like to convert my DB connection and registration / login class to PDO from Mysqli. It is 2 files, together around 160 lines of code - BUT only maybe 40-50 lines of code that should be converted from MYSQLI to PDO. I need this done ASAP. Pls write chat to me and say - I know PDO if u can do this within an hour or so.