Work with Google Maps and Php/Mysql

Basically the work is to write javascript into our PHP code for a desktop (but also smartphone) site. We must let Google Maps "dialogue" with our MySql database and the variables we obtain must be written for PhP, so that we can make our part. It's a 4-8 hours work for people skilled in Google Maps APIs, jquery, json, AJAK and, of course, javascript and PHP.
A good part of the project was already written, but with some issues, that need to be corrected.
The skill to read/write javascript, Php and MySql codes is requested.
We are in a little hurry, so let us have your notes asap.