Get 3 thumbnails from youtube

I need a basic PHP script that does the following: I can enter search criteria and the script returns the thumbnails of the first 3 items in a Youtube search and displays them on the page. I need this done without using ZEND or any other framework. If there is an SDK of some type from Youtube or someone else, it may be possible to use it. The search needs to be done with PHP, not Javascript. ANY 3RD PARTY SOFTWARE OR SDK NEEDS TO BE DISCUSSED BEFORE THE PROJECT STARTS.