PHP ODBC History, and the loss of SolidEE

Hi, I've been working on trying to re-integrate the SolidEE to PHP. I've been successful with the 3.5 engine, but the older original 2.3 has not been going well. In an effort to see why I've check the php3 source code (the last version I'm told that Solid worked with) and noticed there was a section dedicated to Solid (php_solid.....{h|c}). While moving to the unified ODBC though it seems something stopped working, and I'm not entirely sure what. I am willing to believe that the SolidTech engine at version 2.3 was/is not fully ODBC compliant, and that this has been fixed in the 3.5 (and possibly 3.0) engine(s). But for this to be believed I would like to have a little more proof, and so I'm asking is there any history/documentation that can be shared about the changes to the ODBC source? Or maybe someone specific I can direct my questions to?