How to Find Subdirectories Excluding Files and Special Directories in PHP?

Finding Subdirectories Excluding Files and Special Directories in PHP

In web development scenarios, retrieving only subdirectories from a specified directory without including common clutter like regular files, the current directory, or the parent directory becomes a common requirement. This article delves into practical methods to accomplish this task in PHP.

Using Glob() with GLOB_ONLYDIR Option:

The glob() function provides a convenient way to search for pathnames matching a given pattern. To get all subdirectories, we can combine glob() with the GLOB_ONLYDIR option. This option ensures that only directories are returned, eliminating files, ".", and "..".

$sub_directories = glob('./path/to/directory/*', GLOB_ONLYDIR);
foreach ($sub_directories as $directory) {
    // Use each directory in a function
}

Using Array_filter with is_dir Function:

Another approach involves using array_filter() to filter a list of all items in the directory, including ".", "..", and both files and directories. The following code demonstrates this:

$items = scandir('./path/to/directory');
$directories = array_filter($items, 'is_dir');
foreach ($directories as $directory) {
    // Exclude "." and ".." using ternary operators
    if ($directory != '.' && $directory != '..') {
        // Use each directory in a function
    }
}

Note that the provided function array_filter(glob('*'), 'is_dir') filters directories regardless of their names. However, if there are any subdirectories with periods in their names (e.g., ".config"), they will be skipped.

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