I need some classes

Can anyone tell me where to find good classes to work with PostgreSQL.

Something like this. If I want to create a domain:

$domain = new cPGDomain();
$domain->createAndLoad('title', 'varchar', '100', true);

And it crates title domain as varchar(100) NOT NULL and loads it.

I can write them myself but that would take some time (domains are just
example).

Please, not DB Abstraction layers like PEAR::DB or ADOdb, I need
something Postgre specific :)