Reference: Building your commercial Virtual Earth Website using PHP:

We have already seen some basic C# code behind ASP pages that proxy the search and advertising queries. However, being a web based control you are not limited to working solely with Microsoft on the server side. In this article, we will achieve the same result using PHP.

First off, the ViaVirtualEarth PHP example requires cURL [how to tell if cURL is installed]. I followed the instructions in the article to build my own example page (pictured below).

screenshot of integration with MSN Virtual Earth using PHP and cURL library

Script files required
http://virtualearth.msn.com/vems/VE_MapSearchControl.css
http://virtualearth.msn.com/vems/VE_MapSearchControl.js

Also see
Build Your Own Virtual Earth URL