Including a dynamic variable/file

Hi, I created a "control panel" for a client, he wanted the option of changing the template as whenever he pleases. Since he knows HTML I made it very simple by adding a header and a footer. He simple fills in 2 variables in Config.php: $client_header $client_footer In my scripts I am calling it like this: <?php include "../Config.php"; include "$client_header"; ?> but it gives me this error: Warning: main() [function.main]: Failed opening '' for inclusion (include_path='.;C:/php/includes;C:/php/php/class') in c:\php\www\project14342\client\index.php on line 3 Running tests I see taht Config.php IS getting included... Any ideas? Thanks, -Ryan