Why Themes do not show in admin after intalled?

Are you using multi-site?

If not then check permissions of your themes folder.

– Disable all plugins and the try again if push come to shove.

Thanks for your reply.

No multi-site
Permissions of themes folder is 777
WP is new install, no any plugins yet.

Are you seeing the default theme(s)?

i saw the default theme on beginning.But after I installed a new theme, it just show the Current Theme. no others theme.

https://b7x24.com/tm.jpg

Re-upload a fresh, unpacked, copy of the Twenty Eleven folder to wp-content/themes using FTP or whatever file management application your host provides.
https://www.ads-software.com/extend/themes/twentyeleven

Make sure that the theme folder is in the “themes” and not in the theme folder’s folder

themes/
../themefolder/
../..index.php

and not

themes/
../themefolder/
../..themefolder/
../../index.php

P/s: grab us a snapshot of your FTP.

this is snapshot of my ftp,
https://b7x24.com/tm2.jpg

That’s weird. I can access the style.css of the twentyeleven. Let me know if anyone fixed this, I am keen to know.

I find the reason for this problem.
Because the function scandir() is disable on my hosting.
Edit php.ini
on the line of disable_functions
del, “scandir”