Help me please

[Jens14]

function date_diff($str_start, $str_end)

{

 

$str_start = strtotime($str_start);

$str_end = strtotime($str_end);

 

$nseconds = $str_end - $str_start;

$ndays = round($nseconds / 86400);

$nseconds = $nseconds % 86400;

$nhours = round($nseconds / 3600);

$nseconds = $nseconds % 3600;

$nminutes = round($nseconds / 60);

$nseconds = $nseconds % 60;

 

if ($ndays != 0)

{

echo $ndays." days, ".$nhours." hours, ".$nminutes." minutes, ".$nseconds."

seconds.<br>\n";

}

if ($ndays = 0)

{

echo $nhours." hours, ".$nminutes." minutes, ".$nseconds."

seconds.<br>\n";

}

}

 

date_diff("2007/03/14 13:15:45", "2007/03/16 14:00:00");

date_diff("2007/03/16 13:45:00", "2007/03/16 14:00:00");

 

This is the code of my function, what I need is that when days are 0, it only needs to show hours, minutes and seconds, when days and hours are 0 only minutes and seconds, when days, hours and minutes are 0 it only needs to show seconds, I've made a start but even that doesn't work.

 

Can anyone help?

[Jens14]

I need this in an array by the way.