Dynamic variables in a template

[Migs789]

I'm new to vbulletin. I made a custom template that uses a script I made in PHP to look up email addresses. The script stores the email addresses in an array variable. What I'd like to do is use the output from the array variable in the template, or just figure out a way to use any custom variable in the template. Would my variable have to go through the session or a cookie somehow?

I have the feeling this might get rather complicated. Any help would be immensely appreciated.