Convert from Visual Basic (asp) to PHP

I need someone for a really small task. I have the following code in VB ASP to be transfered in PHP (see below). Basically need to post to a protected URL arguments to return a code: ------- Function GenerateCode(Argument) Dim xmlhttp Set xmlhttp = [login to view URL]("[login to view URL]") [login to view URL] "POST","[login to view URL]"&Argument,false, "UserName", "Password" [login to view URL] CodeGenerated = [login to view URL] Set xmlhttp=nothing End Function ----- You won't be able to test the results as the real server as very sensitive information and I cannot give credentials, so I will test the function in my code.