15048 Media Link Checker

I need a link checker written in php that can check multimedia files to make sure they exist. Below is a example list of urls that could be used. Notice that many are not standard http: links, some are mms: and some are php or asx files. Examples: mms://[login to view URL] [login to view URL] [login to view URL] [login to view URL] I need to know that the videos those files call exist NOT the asx or php itself. In other words the asx file is really calling [login to view URL] and the php is really calling [login to view URL]||1151018710319&z=[login to view URL] but as you see its calling an asp file, I NEED to know that the file IT calls exist, so there may be multiple levels that need to be called before you actually get to the media file itself.