Help with Undefined Variable

I have a script referencing a variable, $updated_time, which throws the following error when run: PHP Warning:  Undefined variable $updated_time in blahblahblah/mail_gallery_updates.php on line 60 Line 60 is the line in the script that defines $updated_time: foreach ($shows as $showcode => $showname) {

    if (file_exists("$archive_dir/$showcode")) {
        $archived = true;
        if ($debug) {
            $msg_text .= "Debug: $showname is archived.\n";
        $updated = get_archive_last_updated($showcode);
        $updated_time = $updated["time"];
        $updated_file_date = $updated["file_date"];
    } else {
        $archived = false;
        $updated_time = get_last_updated($showcode);
    }

} Why would PHP think this variable is undefined?