DirectoryIterator를 사용하여 PHP 디렉터리 반복을 어떻게 사용자 정의할 수 있습니까?

<?php

// Define a customizable directory path
$directory = dirname(__FILE__);

// Instantiate a DirectoryIterator object for the specified directory
$dir = new DirectoryIterator($directory);

// Define exclusions, excluding '.' and '..' directories as well as the script itself
$exclusions = array(".", "..", basename(__FILE__));

// Loop through the files in the directory
foreach ($dir as $fileinfo) {
    
    // Ignore excluded files
    if (in_array($fileinfo->getFilename(), $exclusions)) {
        continue;
    }

    // Print the filename using a preferred formatting method
    echo $fileinfo->getFilename() . "<br />\n";

    // Perform any other desired actions, such as sorting or adding it to a link
}