Hook & Variable Question

[kirstyd]

I feel like I'm missing something *very* obvious here.

I have some extra user variables I want to be able to access from any page on the site, so I'm trying to set them in the global_start hook on v3.6.5. But no matter what I do I can't see the variables later on.

E.g. if I just add a very basic plugin on the global_start hook:

global $myvariable;
$myvariable = "boo!";

then later on my vbulletin page $myvariable is not set.

Any ideas?

thanks
kirsty