传开始和结束格式时间，换算时间差

通过计算两个时间点，获取差距的年月日，时分秒

function getDifference($start,$end)
{
    // $start = strtotime($start);
    // $end = strtotime($end);
    if ($start > $end){
        $diff_time = $start-$end;
    }else{
        $diff_time = $end-$start;
    }

    $year_t = 3600*24*365;
    $day_t = 3600*24;
    $hours_t = 3600;
    $minute_t = 60;

    $year = floor($diff_time/$year_t);
    $days = floor(($diff_time-$year*$year_t)/$day_t);
    $hours = floor(($diff_time-($year*$year_t)-($days*$day_t))/$hours_t);
    $minute = floor(($diff_time-($year*$year_t)-($days*$day_t)-$hours*$hours_t)/$minute_t);
    $seconds = $diff_time - $minute*$minute_t-$hours*$hours_t-$days*$day_t-$year*$year_t;
    //$minute = floor();

    $arr = ['year'=>$year,'days'=>$days,'hours'=>$hours,'minute'=>$minute,'seconds'=>$seconds];
    return $arr;
}