PHP的Date用法

一篇好文：

https://thevaluable.dev/php-datetime-create-compare-format/#:~:text=In%20order%20to%20compare%20those,new%20object%20of%20type%20DateInterval%20.&text=The%20output%20indicate%20that%20there,difference%20between%20the%20two%20dates.

官方解释： https://www.php.net/manual/en/function.date.php

<?php

class Login
{
    /**
     * event info
     * @var dynamic object
     * https://krisjordan.com/blog/2008/11/27/dynamic-properties-in-php-with-stdclass
     */
    public $event;
    private $timezone;
    private $timezoneUTC;

    public function __construct() {
        $this->timezone = new DateTimeZone("Asia/Shanghai");
        $this->timezoneUTC = new DateTimeZone("UTC");
        $this->initEvent();
    }
    public function initEvent()
    {
        $this->event= new stdClass();
        $startDate = "2021-03-01 00:00:00";
        $endDate = "2021-03-31 23:59:59";
        $this->event->startDate = new DateTime($startDate, $this->timezone);
        $this->event->endDate = new DateTime($endDate, $this->timezone);
        return true;
    }

    public function index($request)
    {
        $post = isset($request->post) ? $request->post : [];

        //@TODO 业务代码
        $now = new DateTime("now", $this->timezone);
        $diff = $this->event->startDate->diff($now); //8 days
        $eventStartStr = date_format($this->event->startDate, 'Y-m-d H:i:sP'); //2021-03-01 00:00:00+08:00
        $nowStr = date_format($now, 'Y-m-d H:i:sP'); //2021-03-09 09:07:22+08:00

        //change to UTC timezone
        //https://stackoverflow.com/questions/29019927/php-cant-set-correct-datetimezone-to-datetime
        //$nowUTC = $now->setTimeZone($this->timezoneUTC);

        $res = array("now" => $now, "nowStr" => $nowStr, "eventStart" => $this->event->startDate, "evenStartStr" => $eventStartStr, "diff" => $diff);
        return json_encode($res);
    }
}

 

{
    "now": {
        "date": "2021-03-11 16:39:05.965319",
        "timezone_type": 3,
        "timezone": "Asia/Shanghai"
    },
    "nowStr": "2021-03-11 16:39:05+08:00",
    "eventStart": {
        "date": "2021-03-01 00:00:00.000000",
        "timezone_type": 3,
        "timezone": "Asia/Shanghai"
    },
    "evenStartStr": "2021-03-01 00:00:00+08:00",
    "diff": {
        "y": 0,
        "m": 0,
        "d": 10,
        "h": 16,
        "i": 39,
        "s": 5,
        "f": 0.965319,
        "weekday": 0,
        "weekday_behavior": 0,
        "first_last_day_of": 0,
        "invert": 0,
        "days": 10,
        "special_type": 0,
        "special_amount": 0,
        "have_weekday_relative": 0,
        "have_special_relative": 0
    }
}