multiple file input: File inputs can have an attribute of "multiple" which then allows multiple files to be selected in the file section dialog box. Firefox 3.6+ and WebKit browsers only are supporting it so far. Unfortunately the "multiple files" need to be within the same folder, as there is no interface for selecting one, moving folders, and …

multiple_file_input.html

<form method="post" action="upload.php" enctype="multipart/form-data">
  <input name='uploads[]' type="file" multiple>
  <input type="submit" value="Send">
</form>

uploads.php

<?php

foreach ($_FILES['uploads']['name'] as $filename) {
    echo '<li>' . $filename . '</li>';
}