php 利用迭代器遍历文件夹

$scan_dir = "txtDir";
   //下面会遍历txtDir 下面所有字文件夹中的文件哦
    $dir_iterator = new RecursiveDirectoryIterator($scan_dir);
    $iterator = new RecursiveIteratorIterator($dir_iterator, RecursiveIteratorIterator::SELF_FIRST);

//$iterator 变量中会存储所有文件

遍历处理文件:

 foreach ($iterator as $file) {
        if ($file->isFile()) {
            $s = $file->getPathname();
            $file_name = $file->getFilename();
            if($file_name == ‘a.txt‘){
                continue;
            }
}