王新阳

function getAllFilesWithSize() {
        $files = [];
        $iterator = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator($this->cacheBaseDir, FilesystemIterator::SKIP_DOTS),
            RecursiveIteratorIterator::CHILD_FIRST
        );
        foreach ($iterator as $file) {
            if ($file->isFile()) {
                $files[] = [
                    'path' => $file->getPathname(),
                    'size' => $file->getSize()
                ];
            }
        }
        
        return $files;
    }

参考：
PHP标准库 https://www.php.net/manual/zh/book.spl.php
递归目录迭代器 https://www.php.net/manual/zh/class.recursivedirectoryiterator.php