Purpose of "hack attempt" exit in subscribelib2.php

[duncanc]

There is a coding mistake that should be fixed which should stop your failure due to “hack attempt”.

@duncanc

If you have not selected a list, in which case the subscribe page will default to offering all public lists, then the variable $GLOBALS[‘pagedata’][“lists”] will be an empty string. using explode() on an empty string returns an array of one entry, which is itself an empty string.

It is valid to not choose a list for the subscribe page, as then all public lists will be offered. Whether that is appropriate for asubscribe probably needs to be discussed.