Recursive print directory tree

printTree.php

<?php

function scandir_folders($d, $blacklist = array('.', '..')) {
    return array_filter(scandir($d), function ($f) use($d, $blacklist) {
        return is_dir($d . DIRECTORY_SEPARATOR . $f) && !in_array($f, $blacklist);
    });
}

function scandir_all($d, $blacklist = array('.', '..')) {
    return array_filter(scandir($d), function ($f) use($d, $blacklist) {
        return !in_array($f, $blacklist);
    });
}

//@todo probably should limit the depth
function recurse_scandir($d)
{
    foreach (scandir_all($d) as $item)
    {
        $path = $d.'/'.$item;
        if (is_dir($path))
        {
            echo "$path";
            echo "<ul>";
            recurse_scandir($path);
            echo "</ul>";
        }
        else
        {
            echo "<li>";
            echo '<a href="'.$path.'/'.$item.'">'.$item.'</a>';
            echo "</li>";
        }
    }
}
echo "<h1>Directory Tree</h1>";
recurse_scandir('./src')

?>