How can the user modify the PHP code to display folder names as headers and links to PHP files underneath?

To display folder names as headers and links to PHP files underneath, the user can modify the PHP code to iterate through the directories, display each folder name as a header, and list the PHP files within each folder as links underneath the header. This can be achieved by using functions like scandir() to get the contents of a directory and generating HTML output with the folder names as headers and links to PHP files.

<?php
// Specify the directory path
$directory = 'path/to/directory';

// Get the list of directories
$directories = array_diff(scandir($directory), array('..', '.'));

// Iterate through each directory
foreach ($directories as $dir) {
    echo '<h2>' . $dir . '</h2>';
    
    // Get the list of PHP files within the directory
    $files = glob($directory . '/' . $dir . '/*.php');
    
    // Display links to PHP files
    foreach ($files as $file) {
        echo '<a href="' . $file . '">' . basename($file) . '</a><br>';
    }
}
?>