[RLShare]

explode returns an array of the elements that were seperated by the '|' therefore you should use the in_array function to check and see if the ID is in the array.

PHP Code:

$valid_ids = explode("|", $vbulletin->options['allowedids']);
if (!in_array($vbulletin->userinfo['userid'], $valid_ids))
{
//userid not in the option
}