如何在 PHP 中使用 opendir() 按字母順序對目錄清單進行排序？

<code class="php"><?php
$dirFiles = array();

// Open the directory
if ($handle = opendir('Images')) {
    // Read each file
    while (false !== ($file = readdir($handle))) {
        // Strip file extensions
        $crap = array(".jpg", ".jpeg", ".JPG", ".JPEG", ".png", ".PNG", ".gif", ".GIF", ".bmp", ".BMP");
        $newstring = str_replace($crap, " ", $file);

        // Ignore folders, index.php, and Thumbnails
        if ($file != "." && $file != ".." && $file != "index.php" && $file != "Thumbnails") {
            // Add the file to the array
            $dirFiles[] = $file;
        }
    }
    // Close the directory
    closedir($handle);
}

// Sort the files alphabetically
sort($dirFiles);

// Display the sorted list of files
foreach ($dirFiles as $file) {
    echo "<li><a href=\"Images/$file\" class=\"thickbox\" rel=\"gallery\" title=\"$newstring\"><img src=\"Images/Thumbnails/$file\" alt=\"$newstring\" width=\"300\"  </a></li>\n";
}
?></code>