Object-relational mapping and PHP

Hey, gang! I am planning to write a small web application using PHP. The application has several business classes, which store their persistent data in relational database. I don't like the idea of embedding the SQL and other data access related code into my classes, so i am looking for a abstraction layer, which takes care of the dirty work and my classes have only simple methods like save, retrieve and delete. I would rather not reinvent the wheel here, so it would be nice, if anybody could share her/his experience or suggest some PHP-code for this. I have searched web and found nothing very useful so far. TIA, Juhan -- Vastus: Sest inimene loeb suunaga ülevalt alla. Küsimus: Miks ülalpool vastamine on halb?