suggestion concerning PHP sessions

__________
Disclaimer: This e-mail is intended for the exclusive use by the 
person(s) mentioned as recipient(s). This e-mail and its attachments,
if any, contain confidential information and/or information protected
by intellectual property rights or other rights. This e-mail
does not constitute any commitment for ING or its subsidiaries except when
expressly otherwise agreed in a written agreement between the 
intended recipient and the originating subsidiaries of ING, sender of
the mail.
If you receive this message by mistake, please, notify the sender 
with the "reply" option and delete immediately this e-mail
from your system, and destroy all copies of it. You may not, directly
or indirectly, use, disclose, distribute, print or copy, this e-mail
or any part of it if you are not the intended recipient.
You have to take at any time all necessary measures against viruses.