Posted by Markus on 02/02/07 12:08

Hi

In cases where I need to store the session id and/or the remote host in
a database I used to choose tinytext fields so far. Anyway the usual
values for session ids are of 32 characters length, and IP addresses not
longer than 15 characters - so using char(32) resp. char(15) would
actually improve the database performance. But I did not find
informations whether this is safe or not.

So my questions are:
- Is a PHP session id always 32 characters long (if it is generated
normally with session_start() of course), or can it's format vary due to
PHP versions or configurations (I work in shared hosting envirnoments)?
- Can I safely expect $_SERVER['REMOTE_ADDR'] to deliver an IP address
of the format xxx.xxx.xxx.xxx, or can this also be an IPV6 address or other?

Thanks for a clarification!
Markus

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