应该是吗？我的代码：

if ($_POST && $_FILES) {
    $tmp_name = $_FILES[\'file\'][\'tmp_name\'];
    $item = $_FILES[\'file\'];
    $uploads = wp_upload_dir();
    if (is_writable($uploads[\'path\'])) {
        if (!empty($tmp_name))  {
            if ($tmp_name) {
                $overrides = array(\'test_form\' => false);
                $file = wp_handle_upload($item, $overrides);
            }
        }
    }
}