Description
int 
session_cache_expire ( [int new_cache_expire] )
     session_cache_expire() returns the current setting of
     session.cache_expire. The value returned should be read
     in minutes, defaults to 180. If new_cache_expire
     is given, the current cache expire is replaced with
     new_cache_expire.
    
     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).
    
Example 1. session_cache_expire() example 
<?php
  /* set the cache limiter to 'private' */
  session_cache_limiter('private'); $cache_limiter = session_cache_limiter();
  /* set the cache expire to 30 minutes */ session_cache_expire(30); $cache_expire = session_cache_expire();
  /* start the session */
  session_start();
  echo "The cache limiter is now set to $cache_limiter<br />"; echo "The cached session pages expire after $cache_expire minutes"; ?>
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Note: 
      Setting new_cache_expire is of value only, if
      session.cache_limiter is set to a value
      different from nocache.
     
     See also the configuration settings 
     session.cache_expire, 
     session.cache_limiter and session_cache_limiter().