A simple code to handle Time

$time="08:05:00"; //for sake of example .initial time
$curtime="01:05:00";//end time

$t=explode(':',$time);
$h=intval($t[0]);
$m=intval($t[1]);

$add=1;

while($ntime!=$curtime)
{
    $h=intval($h);
    $m=intval($m);
    $m+=$add;

    if($m>=60)
    {
        $h++;
        $m=$m-60;
    }
    if($h>23)
        $h=0;

    if($h<10)
    {
        $h="0".$h;
    }
    if($m<10)
    {
        $m="0".$m;
    }

    $ntime=$h.":".$m.":00";
    echo $ntime."
"; //it will echo each minute
}