I'm working on a site of which the main php script requires a number of other include-scripts with functions and class-definitions. Some files are always included, some only when specific parameters are passed. Nothing unusual there.
But the weird thing is that I occasionally get errors and warnings, that would seem to be the result of a missing include-file. Stuff like 'function not found' or 'class not found'... If I reload the page, the error always disappears, as if nothing was wrong.
It is completely unpredictable when the errors will appear, sometimes they don't appear at all, sometimes they appear on every other reload. Does anybody have any idea what could be causing this?
