$stmt = self::$pdo->prepare($sql);
$stmt->execute(array($data, self::$ctime, $sid));
}
//如果没有数据，就新插入一条数据
} else {
if (!empty($data)) {
$sql = "insert into session(sid, sdata, utime, uip, uagent) values(?, ?, ?, ?, ?)";
$stmt = self::$pdo->prepare($sql);
$stmt->execute(array($sid, $data, self::$ctime, self::$uip, self::$uagent));
}
}
}
//销毁 session_destroy()
public static function destroy($sid)
{
$sql = "delete from session where sid=?";
$stmt = self::$pdo->prepare($sql);
return $stmt->execute(array($sid));
}
//回收垃圾
public static function gc($maxlifetime)
{
// utime < ctime - self::$maxlifetime
$sql = "delete from session where utime < ?";
$stmt = self::$pdo->prepare($sql);
return $stmt->execute(array(self::$ctime - self::$maxlifetime));
}
}
//开启
DBSession::start($pdo);