PHP Manual
SessionHandlerInterface
Cleanup old sessions

SessionHandlerInterface::gc

(PHP 5 >= 5.4.0, PHP 7)

SessionHandlerInterface::gc — Cleanup old sessions

说明

abstract public SessionHandlerInterface::gc ( int $maxlifetime ) : int

Cleans up expired sessions. Called by session_start(), based on session.gc_divisor, session.gc_probability and session.gc_maxlifetime settings.

参数

maxlifetime: Sessions that have not updated for the last maxlifetime seconds will be removed.

返回值

会话存储的返回值（通常成功返回 0，失败返回 1）。

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