kint-php / kint

        // '@' is used to prevent the dreaded timezone not set error

        $out = @date('Y-m-d H:i:s', $sec).'.'.substr($usec, 2, 4);

        if ($r->lap !== null) {

            $out .= "\n<b>SINCE LAST CALL:</b> <b class=\"kint-microtime-lap\">".round($r->lap, 4).'</b>s.';

        }

        if ($r->total !== null) {

            $out .= "\n<b>SINCE START:</b> ".round($r->total, 4).'s.';

        }

        if ($r->total !== null) {

            $out .= "\n<b>SINCE START:</b> ".round($r->total, 4).'s.';

        }

        if ($r->avg !== null) {

            $out .= "\n<b>AVERAGE DURATION:</b> <span class=\"kint-microtime-avg\">".round($r->avg, 4).'</span>s.';

        }

        $unit = array('B', 'KB', 'MB', 'GB', 'TB');