脚本运行了多长时间?

How can I check how long my exec() script has been running for? The output would be something like this:

1 Day(s) 2 hours 23 minutes 12 seconds

I don't want it to output more then 60 seconds like this

1 Day(s) 2 hours 23 minutes 118 seconds

My code:

$start = time();
$s = time() - $start;
$m = floor($s / 60);
$h = floor($m / 60);
$msg = "script running for approx: Seconds - $s | Minutes - $m | Hours - $h";
echo $msg;

Divide the seconds part on 60 with / you will get the exact mins add the to your mins and then divide the seconds part with % you will get the remaining second, which are less than 60.

Edit

Even you might have problem with your mins as well. change that too

$start = time();
$s = time() - $start;
$m = floor($s / 60);
$h = floor($m / 60);

$mins = ($m %  60);
$seconds =  ($s % 60);

$msg = "script running for approx: Seconds - $seconds  | Minutes - $mins | Hours - $h";
echo $msg;

If using PHP 5.4, this is gives the exact amount of time spent in PHP

$runtime = round(microtime(TRUE) - $_SERVER['REQUEST_TIME_FLOAT'], 6);
echo "Script running for $runtime seconds";