convert 19 php3 files into php5

We have a simple cms-system which works with a mysql database together. Our client has been switched the apache server from version 1.3 to 2.2. DB-connetion works fine. HTML and PHP files will be diplayed also in the webbrowser. But every of the old .php3 files produce now serveral variables errors. We need a professional who is able to switch the code. We will pay 8,-€ per working file. So it is a milestone project, with based on the delivery per new working php-file.