Creating Session Variables

Hmmm, this doesn't seem clear in the docs ... Consider this: function foo() { $_SESSION['varname'] = "test"; ..... } At this point: - Can I reference $varname inside the function? If so, must it be declared global first? Or can I only reference it via $_SESSION['varname']? - Can I reference it outside the function (as $varname) after the function returns? In other words if one creates a variable by adding it to the session array, does it then become a variable in either the global or (though I can't quite imagine this) current local scope? Thanks, ---------- Tom Rawson