重新整理结构

web/demos/index.php

@@ -0,0 +1,23 @@
+<?php
+// 遍历demos文件夹下的所有文件夹，然后再遍历所有文件
+$directory = new DirectoryIterator(dirname(__FILE__));
+$folders = [];
+$files = [];
+
+foreach ($directory as $folderinfo) {
+  if ($folderinfo->isDir() && !$folderinfo->isDot()) {
+    $folders[] = $folderinfo->getFilename();
+  }
+}
+
+foreach ($folders as $folder) {
+  $subDirectory = new DirectoryIterator(dirname(__FILE__) . $folder);
+  foreach ($subDirectory as $fileinfo) {
+    if ($fileinfo->isFile() && $fileinfo->getExtension() == 'html') {
+      $files[] = $folder . '/' . $fileinfo->getFilename();
+    }
+  }
+}
+sort($folder);
+sort($files);
+?>