How can you specify the runtime length of a session in PHP?

To specify the runtime length of a session in PHP, you can use the `session.gc_maxlifetime` directive in your php.ini file or set it programmatically using the `ini_set()` function in your PHP script. This directive specifies the number of seconds after which data will be seen as 'garbage' and cleaned up. By setting this value, you can control how long a session will last before it expires. 

// Set the session runtime length to 1 hour (3600 seconds)
ini_set('session.gc_maxlifetime', 3600);

// Start the session
session_start();

Keywords

session runtime length PHP configuration session.gc_maxlifetime

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