should I be using phplib?

I'm just full of questions tonight [for those on the windoze list]. I have a more generic one now, though. I'm developing a php4 application that will eventually run under both windoze and your favorite *NIX flavor. It will also need access to a database, such as Oracle 7, 8, Sybase, Informix, and M$ SQL Server. I do not want to hard code in my OCILogin functions in my php application, as I would then have to write several different versions of the app [one for each rdbms that i'm supposed to support]. From what I can gather at the phplib w3 site, phplib acts as a wrapper for each of the APIs that php supports [except for Informix and Sybase :( ] via DB_Sql [unless i'm reading this incorrectly]. But can phplib run with php4 under both windows and *nix? And, more importantly, does it in fact do what I think it does? I would like to be able to just have to edit a line or two to let php4/phplib know which rdbms it should be wrapping for. There will be hundreds of SQL statements in this code, and the nightmare of writting each one with the different php database functions just sends chills up my spine. :) TIA, once again, /vjl/