打开文件夹并将所有文件保存在另一个文件夹中

Question

How can I open the directory selection box on the server, choose a folder and when I click submit all the files in the old folder go to the new folder?

<form method="post" action="folder.php">
   <input type="file" name="folder" id="folder"></td> </tr>
   <input type="submit" value="Submit">
</form>

$OldFolder = $_POST['folder'];

$newFolder = "/newFolder";