Мусор в именах файлов или прячем наших лебедей (wordpress)

<?php

/**
 * Plugin Name: Rename Attachments
 */

/**
 * Class RenameAttachments
 * @package RenameAttachments
 */
class RenameAttachments
{
    /**
     * Hooks the "add_attachment" action.
     */
    public static function register()
    {
        add_action('add_attachment', array(__CLASS__, 'rename'));
        add_filter(
            'filter_attachment_filename',
            array(__CLASS__, 'filterAttachmentFileName')
        );
    }

    /**
     * Filters attachment file name.
     * @param string $file Attachment file name.
     * @returns string
     */
    public static function filterAttachmentFileName($file)
    {
        return crc32(md5(mt_rand() . microtime()) . sanitize_file_name($file)) . '_' . sanitize_file_name($file);
    }

    /**
     * Renames the attachment.
     * @param int $attachmentId Attachment ID.
     */
    public static function rename($attachmentId)
    {
        if (!$path = get_attached_file($attachmentId)) {
            return;
        }

        $trash = array();
        $uploads = wp_upload_dir();
        $original = basename($path);

        $filtered = apply_filters(
            'filter_attachment_filename',
            $original
        );

        $images = glob(dirname($path) . '/' . pathinfo($original, PATHINFO_FILENAME) . '*');
        if ($images === false || (is_array($images) && count($images) === 0)) {
            return;
        }

        foreach ($images as $image) {
            $name = str_replace($original, $filtered, $image);
            if (copy($image, $name)) {
                $trash[] = $image;
            }
        }

        $path = dirname($path) . '/' . $filtered;
        $attachedFile = str_replace($uploads['basedir'] . '/', '', $path);

        if (update_post_meta($attachmentId, '_wp_attached_file', $attachedFile) === true) {
            foreach ($trash as $file) {
                @unlink($file);
            }
        }
    }

}

RenameAttachments::register();