General help

Hello

Thanks for your report.

I have the same error in moodle. Temporal solution, in /backup/util/xml/xml_writer.class.php, the function xml_safe_utf8:

 protected function xml_safe_utf8($content) {
        $content = preg_replace('/[\x-\x8\xb-\xc\xe-\x1f\x7f]/is', '', $content ?? ''); // clean CTRL chars.
        $content = preg_replace("/\r\n|\r/", "\n", $content); // Normalize line&return=>line
        return fix_utf8($content);
    }

Replace content function for this:

protected function xml_safe_utf8($content) {
    $content = preg_replace('/[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F]/s', '', $content ?? '');
    $content = preg_replace("/\r\n|\r/", "\n", $content);
    return fix_utf8($content);
}

In my case, it didn’t help—or rather, it only helped partially. Today a teacher accidentally deleted course items and reported that restoring from the Recycle Bin doesn’t work. I stumbled on this bug and upgraded to 4.5.4 from 4.5.2. I deleted a course item and successfully restored it, BUT items deleted before the update still return “error/restore_unknown_restore_type.”
I’m running Gentoo with PHP 8.2.28 (PCRE 10.45 2025-02-05).
Do you think upgrading to 5 will help, or will it make things worse? The deleted items are very important to the user.

Thanks, everyone.