Make PHP read server folders

Question

Colleagues.

I now took a project here at work, where in the beginning this project was developed. It works as follows:

It was created in the index.php page some folders with jpg, where it directs to the respective links. But the (PDF) files are sent via FTP, where the sector here of work creates folders and subfolders and places these PDF files.

The person who did this "project" only changed the jpg image link on the home page. I thought about redoing this project, only that there are already dozens of folders and subfolders with these pdf files.

When we click on the folder link, the index/of page appears and the file name:

What I thought to do, create a file in html or PHP, customize and see if with PHP, Jquery, Ajax, I don’t know for sure, read in the names of the folders/ subfolders of the server and create something more customized with image next to the name of the file or something in this sense.

Answer 1

This way? In this case it selects the folder and returns the existing subfolders in it. If it is, study a little about. Directoryiterator

<?php
    // atribuição a variável $dir
    $dir = new DirectoryIterator( './pasta/' );

    // atribui o valor de $dir para $file em loop
    foreach($dir as $file ) {
        // verifica se o valor de $file é diferente de '.' ou '..'
        // e é um diretório (isDir)
        if (!$file->isDot() && $file->isDir()) { 
            // atribuição a variável $dname
            $dname = $file->getFilename();

            // imprime o nome do diretório
            echo $dname."<br>";
        }
    }
?>

Answer 2

I tested that code from here and served perfectly.

<?php

function listFolderFiles($dir)
{
    $ffs = scandir($dir);
    echo '<ol>';
    foreach ($ffs as $ff) {
        if ($ff != '.' && $ff != '..') {
            echo '<li>'.$ff;
            if (is_dir($dir.'/'.$ff)) listFolderFiles($dir.'/'.$ff);
            echo '</li>';
        }
    }
    echo '</ol>';
}
listFolderFiles('/websites/');