Fatal error cannot instantiate when trying to use http_class with http.php

Am I missing something? I am trying to use the http.php file in my program, but I keep getting this error:

"Fatal error: Cannot instantiate non-existent class: http_class in /home/tznius/youtube/btube.php on line 84"

Whe开发者_StackOverflow中文版n I examine the http.php class itself (btube.php includes it), I don't see any declarations for the http_class and when I google it, it keep finding references to the http.php file again.

Which files, libraries, etc. am I missing

If you're using a prepackaged library, my guess is that your include path needs to be modified to include the library path. Are you getting any warning messages before the fatal error?