globalize a variable in function()?

[TECK]

if i make a file and create a function in there, is there the need to globalize certain variables?

global $bbuserinfo;

from my logic, is not.. since is used only on that file.
let me know if i'm correct. thanks.

[Admin]

<a href="http://php.fastmirror.com/manual/en/functions.php" target="_blank">http://php.fastmirror.com/manual/en/functions.php</a>