比较两个时间的差值

    /**
     * Notes: 获取两个日期的差值
     * User: Sen
     * DateTime: 2020/7/15 9:56
     * Return:
     */
    public function DiffDate($date1, $date2) {
        if (strtotime($date1) > strtotime($date2)) {
            $ymd = $date2;
            $date2 = $date1;
            $date1 = $ymd;
        }
        list($y1, $m1, $d1) = explode('-', $date1);
        list($y2, $m2, $d2) = explode('-', $date2);
        $y = $m = $d = $_m = 0;
        $math = ($y2 - $y1) * 12 + $m2 - $m1;
        $y = round($math / 12);
        $m = intval($math % 12);
        $d = (mktime(0, 0, 0, $m2, $d2, $y2) - mktime(0, 0, 0, $m2, $d1, $y2)) / 86400;
        if ($d < 0) {
            $m -= 1;
            $d += date('j', mktime(0, 0, 0, $m2, 0, $y2));
        }
        $m < 0 && $y -= 1;
        return array($y, $m, $d);
    }