Conditional PHP Script to one of two graphic buttons

I have an existing PHP script on a membership site. I deliver large files to my members when they are ready to be downloaded from the download page. I need a php script that will: Check a hardwired directory to see of a certain file exists example: [login to view URL] IF that file exists, I want the script to display a particular download button along with the hyperlink info. IF that file is NOT in the subdirectory, THEN display another not ready download button graphic with NO hyperlink info, IOW, just a graphic. Both graphics already are in the sites' /images The script will simply select the appropriate one to match the condition. In VB6 it would be something like: If DIR$(downloads/[login to view URL]) then <p><a href=".downloads/[login to view URL]"> <img border="0" src="file:///C:/AutoBurnCD/website/AutoBurn%20CD/images/[login to view URL]" width="292" height="101"></a></p> ELSE <img border="0" src="file:///C:/AutoBurnCD/website/AutoBurn%20CD/images/[login to view URL]" width="292" height="101"> ENDIF BUT I need to do it in PHP That way if the file isn't uploaded yet, they won't get a file not found error. I will insert the proper paths, etc, but make sure the code is well commented as I am not a PHP programmer, I am a VB6 programmer. Thanks The dowload pg