Undefined offset . How to rid this error?

[eluser]vitoco[/eluser]
it works, but i'm used to set defaults outside conditionals, like this

Code:

$parts = explode("-", $code);
// DEFAULTS
$code = NULL;
$userid = NULL;
// CORRECT CONDITION
if (count($parts) == 2)
{
    $code = $parts[0];
    $userid = $parts[1];          
}

Slds