This job is probably best suited for someone who has implemented the twitter API with PHP recently -- for such a person it should be very quick.
I will give you Twitter API keys for a particular account -- you don't need to create them for this project, but you'll need to know where to insert them so the code will work properly without modification.
1) a PHP page / page + folder that uses the API to pull the twitter timeline for this account and display it on the page. (The formatting does not need to be attractive but it should be clear.)
2) a PHP page / page + folder that searches the entire, public twitter timeline for a specific word taken as GET var in the URL.
When I receive these deliverables, I will upload them to our site and check them.
Please write and comment the code in a clear manner.
This job has the potential for substantial follow-on work.