session_cache_expire

Function name: session_cache_expire()

Function description: session_cache_expire() is used to get or set the cache expiration time of the current session.

Function parameters: None

Return value: If a new cache expiration time is set, the previous cache expiration time is returned; if a new cache expiration time is not set, the current cache expiration time is returned.

Applicable version: PHP 4.2.0 and above

Usage example:

1. Get the cache expiration time of the current session:

 $cacheExpire = session_cache_expire(); echo "当前会话的缓存过期时间为：{$cacheExpire} 分钟";

2. Set the new cache expiration time to 60 minutes and return the previous cache expiration time:

 $previousExpire = session_cache_expire(60); echo "先前的缓存过期时间为：{$previousExpire} 分钟";

Notes:

• The session_cache_expire() function can only be called before session_start().
• The cache expiration time is an integer in minutes. If the setting time is less than or equal to 0, the session cache will never expire.
• The cache expiration time only affects the session cache, not the browser cache.