a little math

maybe someone can figure why sometimes i get negative values for seconds.. $job['finished'] and $job['finished'] are both unix timestamp. i subtract both to get how many seconds some thing took.. well you should be able to read the rest. sometimes it works fine but other times i get negative seconds. $job['run_time'] = ($job['finished'] - $job['started']); $minutes = number_format($job['run_time'] / 60, 0, '', ''); // seconds left after calculating minutes $seconds = (($job['run_time']- 60) * $minutes); $job['runtime'] = $minutes . ' mins ' . $seconds . ' secs';