Fixed MANTIS-4685 (Admin Zone home page crashes if all tips dismissed on newer PHP versions)

        // Choose a tip from the level we're on

        if (!array_key_exists($level, $tips)) {

            $tip = do_lang_tempcode('ALL_TIPS_READ', $esc_free_support, $esc_brand_name, array($remaining_tip_params, get_tutorial_url('tut_do')));

            $tip = do_lang_tempcode('ALL_TIPS_READ', $esc_free_support, $esc_brand_name, $remaining_tip_params);

            $level = 5;

            $tip_code = '';

            $count = 0;