Question

How can I get all sub-directories of a given directory without files, .(current directory) or ..(parent directory)
and then use each directory in a function?

Answer 1

Option 1:

You can use glob() with the GLOB_ONLYDIR option.

Option 2:

Another option is to use array_filter to filter the list of directories. However, note that the code below will skip valid directories with periods in their name like .config.

$dirs = array_filter(glob('*'), 'is_dir');
print_r($dirs);