Seconds to days, hours, minutes in PHP

function sectotime($sec)
{
$d = str_pad(floor($sec/86400),2,0,STR_PAD_LEFT);
$h = str_pad(floor(($sec%86400)/3600),2,STR_PAD_LEFT);
$m =  str_pad(floor(($sec%86400)%3600/60),2,0,STR_PAD_LEFT);
return $d.':'.$h.':'.$m;
}

sectotime(90000);