Clarification on PHP::session_cache_expire?

[jtp51]

ZEND: The cache expire is reset to the default value of 180 stored in session.cache_limiter at request startup time. Thus, you need to call session_cache_expire() for every request (and before session_start() is called).

To make sure I understand, does this mean that if I want to set the expiration to 5 minutes that on EACH page I need to:

session_cache_expire(5);
session_start();

Or can I just call 'session_cache_expire' one for an entire application?

Thank you.

[rehfeld]

once per page request, in other words, whenever you call session_start(), you must also call session_cache_expire(5);