. File

The . files are files whose name start with a dot. By convention, they are considered hidden files, and are not listed when scanning a directory. Otherwise, they may be files or directories: .env, .ssh, .git, etc.

<?php

    // files
    $files = glob('./*');

    // hidden files
    $files = glob('./.*');

?>

Related : Path, . Directory, Dot-dot Directory ..