Convert a ASPX service to PHP

Project requires someone who is fluent in CSharp and in practice coding PHP. We have built a CSharp web service wrapped up as an ASPX web service and require an expert to transform the basic capabilities from this ASPX service into a PHP script. In other words we need someone to write from scratch a PHP script that will mimic the exact behavior of the ASPX service. Functionality: The PHP file will need to consume a CSV payload from an HTTP request originated from a SWF file, generate a physical CSV file on the server relative to the PHP script, and then return the URL back to the SWF. The PHP file will also consume a few parameters from the HTTP request including the CSV file name and the relative path where the CSV file will be generated to. Provided Materials We will provide the CSharp code, a test application to execute and test with, and anything else you need. Overall this is a very simple project for someone who codes PHP on a regular basis. We will will need a reference from the last PHP project you worked on and the last CSharp project you worked on.