Application Variables

Is there a PHP equivalent to Microsoft ASP's global.asa or Cold Fusion's application.cfm? I could, I suppose, just auto prepend an include file to all of the pages in each of my virtual domains, but I'd really rather not do that if I don't have to. I understand that the major benefit of the global.asa or application.cfm is that it doesn't have to be reparsed every time its included variables are used, unlike an auto prepend, which, I assume must be parsed on every page call. Anybody have an answer? Travis Carden Web Developer, Web Impressions, L.L.C. http://www.WebImpressions.com/