[Zope] Passing a Variable from PHP

[Ben Ocean]

Hi;
I need to pass a variable from a php script (served by Apache) to a Zope 
script (served by ZServer). I can't do this as a hidden field in a form 
since there is no *form* on the php script: indeed, the user never notices 
the script as it doesn't generate any html. This is a randomly generated 
variable. How do I communicate it?
TIA,
BenO