php -仅对子文件夹级别的文件进行计数，每个文件夹的回显总数

<?php
function countFilesInSubfolders($folder) {
    $count = 0;
    $dir = new RecursiveDirectoryIterator($folder);
    $iterator = new RecursiveIteratorIterator($dir);
    
    foreach ($iterator as $file) {
        if ($file->isFile()) {
            $count++;
        }
    }
    
    return $count;
}

$folderPath = '/path/to/parent/folder';
$count = countFilesInSubfolders($folderPath);
echo "Total number of files in subfolders: " . $count;
?>