Show your position live on the web using your phone as a tracker
Very simple and easy to implement GPS / Cell tracker. It uses an app on your phone to relay data to this script. The script then displays an OpenStreetMap via the browser. Consists of just one simple PHP file, no MySQL required.
Example: http://sgts.eppenga.com/tracker.php
AppForMap is a collection of PHP modules for web mapping. The project comprises both clients and server for dealing with simple features, GML, WKT, WMS, WFS, PostGIS databases etc. It can also act as a backend for an OpenLayers frontend.