Best way update from Pear::db to PDO,or PEAR::MDB2?

Question

In my current project we use old library PEAR:DB.

We need replace this library on something better. But project in production,and very big,and many code from db layer use PEAR::DB.

What is the best way replace old code ,without broken functionality?
Maybe write emulator class for DB? or install MDB2 and just replace all DB to MDB2?

Updated:Now for CRUD use doctrine/dbal component!

Answer 1

PEAR's MDB2 package is a logical progression from the DB package, but even then it's considered very old now. You are probably better of using Doctrine's Database Abstraction Layer.