Hi,
If I understand you rightly, you are looking for a desktop client which will communicate with a server. The server program is to be written in PHP and (I presume) will communicate with a database. If that is correct, I would like to bid on your project. So far as the desktop is concerned, I have very many years experience programming in C, stretching all the way back to a time when there was no such thing as the internet. Although I will obviously have had fewer years experience with PHP, I am still proficient in that language.