Why is it important to exclude the entries "." and ".." when listing directories and subdirectories in PHP?

When listing directories and subdirectories in PHP, it is important to exclude the entries "." and ".." because these represent the current directory and the parent directory, respectively. Including these entries can lead to infinite loops or unintended behavior in your code. To exclude these entries, you can use the `glob` function with the GLOB_ONLYDIR flag to only retrieve directories. 

$directories = glob('*', GLOB_ONLYDIR);
foreach ($directories as $directory) {
    if ($directory != '.' && $directory != '..') {
        echo $directory . PHP_EOL;
    }
}

Keywords

PHP directories subdirectories listing exclude

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