I have researched a few ways to set a "hard" session timeout on a shared 
server. Does anyone have comments on the advantages/disadvantages of each 
approach? Are there other alternatives?

1. Override the php.ini settings in an .htaccess file:

php_value session.gc_maxlifetime 900
php_value session.gc_divisor 1
php_value session.gc_probability 1

2. Put a "previous request" timestamp into the session, and compare it to 
the current timestamp on a request.

3. Set a <meta> refresh to a "kill session" script.

Will there be a performance hit for all applications on the server under 
the first method?

TIA

Kirk

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