如何检查保险丝文件夹是否存在

我在服务器上安装了一个指向sftp站点的文件夹. 我需要通过php检查我们是否可以看到其中的文件夹.

I have a folder mounted on the server that points to an sftp site. I need to check via php whether we can see the folders inside it.

我尝试过

file_exists("/path/to/the/mount/folder");

但是它返回的是false(这是我所期望的)，我可以通过文件系统并使用终端来导航到它.

but its returning false (which I kind of expected), I can navigate to it through the file system and using terminal.

(也尝试过is_dir&& is_link)

(also tried is_dir && is_link)

这是我从外壳上安装它的方式

Here's how I mounted it from the shell

echo PASS | sshfs UNAME@URL: /path/goes/here -o password_stdin