如何用PHP统计文件夹和子文件夹中的文件

function countFiles($folderPath) {
    $fileCount = 0;
    $files = scandir($folderPath);

    foreach ($files as $file) {
        if ($file == '.' || $file == '..') {
            continue;
        }

        $filePath = $folderPath . '/' . $file;

        if (is_dir($filePath)) {
            $fileCount += countFiles($filePath);
        } else {
            $fileCount++;
        }
    }

    return $fileCount;
}

$folderPath = '/path/to/folder';
$totalFiles = countFiles($folderPath);
echo "Total files in folder and subfolders: " . $totalFiles;