$date1=date_create("2015-11-02");
$date2=date_create(date('Y-m-d',time()));
$diff=date_diff($date1,$date2);
$has_start = $diff->days + 1;
echo $count_day = 10000 * pow($has_start, 2);

var_dump($diff);
// echo $diff->format("%R%a days");

$start_day = "2015-11-04";
$cur_day = date('Y-m-d',time());
$start_time = strtotime($start_day);
$cur_time = strtotime($cur_day);
$diff = $cur_time - $start_time;

$diff_day = ceil($diff/3600/24) + 1;

$d=ceil($diff/3600/24);
$h=ceil($diff%(3600/24)/3600);
$m=ceil($diff%(3600/24)/60);
echo "相差$d天$h小时$m分";