php-coding/13.test3.php

<?php
$path = 'data';
if(is_dir($path)){
    $resource = opendir($path) or die('目录打开失败');
//    echo $resource;
    $scandir = scandir($path);
    foreach ($scandir as $item){
        echo $item.'<br>';
    }
}else{
    echo '文件夹路径不存在';
}