Exec PHP into a variable (w. query)

[Anon]

Hi, I was just wondering how it would be possible to execute a local PHP string into a variable (with a querystring).
I've looked at the programme execution functions but they all run as if from the command prompt. I could do with something like
$var = include("filename.php?var1=x&var2=y");

without having to have filename.php return a value explicitly.

Is this possible? Or could you suggest a (secure) work around.

Thansks