Adding a search bar to an existing website

I need someone to add a search feature to an existing business website to search that website's content (basically a search box and a search results page). It doesn't need to be too complicated - Search results can be ordered by name (some types of pages will have preference over others though), when the user clicks on a search result, it should lead them to the appropriate page, The website was built using PHP and MySql - The site's structure is quite messy so it might make things a little bit trickier. For this job, I need someone who is trustworthy and has good HTML, PHP and MySQL skills (PhpMyAdmin) - JavaScript would be nice too but it may not be necessary for this task. The person I'm looking for should have done some previous work through freelancer.com. If you're interested, please send me links to some samples of your work. I'm particularly interested in seeing links to some websites/projects you've worked on (I'm especially interested in PHP-based sites that have a search feature).