(PHP 5 >= 5.4.0, PHP 7)
SessionHandlerInterface::gc — Cleanup old sessions
$maxlifetime
)Cleans up expired sessions. Called by session_start(), based on session.gc_divisor, session.gc_probability and session.gc_lifetime settings.
maxlifetime
Sessions that have not updated for the last maxlifetime
seconds will be removed.
会话存储的返回值(通常成功返回 0,失败返回 1)。