Which function will be used to destroy the pre define session variable after a certain time?

In CodeIgniter, which function will be used to destroy the pre define sessio开发者_开发技巧n variable(id, username) after specified time i.e. 20sec?

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Ther is no specific function for that, but in ci/root/application/config/config.php around line 244 $config['sess_expiration'] = 7200; this sets your session length. Please notice that codegniter sessions are stored in cookies.

If you want to destroy a session after n seconds i recommend you to use something else, like:

• Memcached
• ini_set("session.gc_maxlifetime", SESSION_LIFETIME_IN_SECONDS)