Delete index.htm or index.html. If you use php, remove index.php

Hello.

If .htaccess is available, you can display a list of files in the directory by writing the following in .htaccess.
Note that this method is only available if you use Apache as the server software.

options +Indexes

You shouldn't do this through coding.  That's both harder and less secure than it needs to be. Both Apache and Nginx have configurations for this.  I don't know how to turn Apache's on, but Nginxs info is here: http://nginx.org/en/docs/http/ngx_http_ … odule.html

I'm going to point out that with respect to difficulty, we're talking about enabling one line in your web server's configuration vs getting the PHP config right, then writing a PHP script to enumerate the directory.  Perhaps you don't have access to the web server's configuration, in which case the coding might be worth it, but otherwise one of these is clearly easier.

Then I'm going to leave the discussion because this stands alone and anything else I might say on this topic would be redundant.