ASP to PHP

Here is some code in ASP that I want to convert to PHP. I honestly have no idea about much of PHP yet so I don't know where to start with this. If someone has a minute, can you please get me started til I get my head around the language Cheers ----------ASP Code------------------------ <% ' Declare Variables Dim MoveFile, strUserName, strPath ' Collect UserName from Form input strUserName = Request.Form("UserName") If Len(strUserName) = 0 Then ' no UserName entered 'Sub NoUserName () Response.Write("Please <b>re-enter</b> your UserName") 'End Sub End If ' Check to see if folder already exists strPath = "C:\inetpub\wwwroot\" & strUserName Set MoveFile = CreateObject("Scripting.FileSystemObject") ' If folder doesn't exist, create it & move file If Not MoveFile.FolderExists(strPath) Then MoveFile.CreateFolder(strPath) MoveFile.CopyFile "C:\inetpub\wwwroot\templates\referred.htm", strPath & "\index.htm" 'Response.Redirect strPath & "\index.htm" Else ' UserName already exists Sub UserNameExists () Response.Write("The Username you have selected <b>already exists</b>. Please try again") End Sub End If SET MoveFile = Nothing %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>Enter your username</title> </head> <body> <% ' Call NoUserName ' Call UserNameExists %> <form name="frmSelectUsername" action="move-files.asp" method="post"> Please <b>enter a Username</b> that you want to use<br> <input type="text" name="UserName" size="20"> <input type="submit" value="Submit" name="submit"> </form> </body> </html>