Загрузка нескольких фалов WordPress

<?php
require($_SERVER['DOCUMENT_ROOT'] . '/wp-load.php');
if (!function_exists('wp_handle_upload'))
        require_once(ABSPATH . 'wp-admin/includes/file.php');

    $files = $_FILES['files'];
    $overrides = ['test_form' => false];
    foreach ($files['name'] as $key => $value) {
        if ($files['name'][$key]) {
            $file = array(
                'name'     => $files['name'][$key],
                'type'     => $files['type'][$key],
                'tmp_name' => $files['tmp_name'][$key],
                'error'    => $files['error'][$key],
                'size'     => $files['size'][$key]
            );
            $movefile = wp_handle_upload($file, $overrides);
            if ($movefile && empty($movefile['error'])) {
                $attachment = array(
                    'guid'           => $wp_upload_dir['url'] . '/' . basename($movefile['file']),
                    'post_mime_type' => $movefile['type'],
                    'post_title'     => preg_replace('/\.[^.]+$/', '', basename($movefile['file'])),
                    'post_content'   => '',
                    'post_status'    => 'publish'
                );
                $attach_ids[] = wp_insert_attachment($attachment, $movefile['file']);
            }
        }
    }