Object oriented DB access

So I'm doing a very low scale project - just a simple blog/template for a guy. PHP5/MySQL5 on Apache.

I had programmed mostly the entire thing without abstracting the database, since I figured this project would be pretty specific to my clients needs, now however... I'm really liking how this turned out and would like to use the backend for my own personal site.

The problem is my personal site is on Postgre.

So my question is... do I dick around with PEAR::DB (does that project even exist anymore?) - or, do I just go through searching query by query and changing them by hand?

SQLite also has many features that MySQL blatantly lacks. I shall not be a faggot and list them all, I'll let the people that actually care look up what stuff it can do and let the unwashed masses be blissfully ignorant of its benefits and keep using their lousy excuse for a hideously bloated DBMS, because that's what they would have done anyway.