need to developpe a php driver for the openbase DB

Hi , I'm in contact with the guys at www.openbase.com Their database has a great mac like graphical interface and is very used on macOSX platform . I told them about PHP and they are interrested in developping a php driver for their database ( base on the mysql one per example ) Where can i (or they) found all the informations to manage the developpement of this driver. I was on the official php site but i don't found - any chapter relating to these driver's architecture - and any direct link to the developper team. I NEED HELP I NEED A PHP DEVELOPPER CONTACT OR A LINK TO A DETAILLED DOCUMENTATION NEEDED TO DEVELOPPE A SUCH DRIVER Thank you very much ALEXANDRA (from france)