session('test',1);
$site = F(session('test'), '', './Cache/Sys/sites/');
dump($site);
$auth = F(session('test'), '', './Cache/Sys/auth/');
dump($auth);

两次dump出来的数据都是 /Cache/Sys/sites/1.php里保存的数据
读取不到/Cache/Sys/auth/1.php的数据