碳日期比较和日期格式

Question

我正在尝试以下操作：

我正在开发一个函数来比较以下格式的两个日期：

$date = "Mon Sep 14 2020 02:07:25 GMT+0000 (Coordinated Universal Time)";

该函数如下（它有一些用于我的测试的额外代码）：

private function isMoreRecent($newVariation, $oldVariation) {

    // dates for testing:

    $newVariation = "Mon Sep 14 2020 02:07:25 GMT+0000 (Coordinated Universal Time)";

    $oldVariation = "Sun Sep 13 2020 12:02:49 GMT+0000 (Coordinated Universal Time)";

    // dates for testing:

    // date: 2020-09-14 02:07:25.0 UTC (+00:00)

    $newVariationFormat = $this->reformatDate($newVariation);

   

    // date: 2020-09-13 12:02:49.0 UTC (+00:00)

    $oldVariationFormat = $this->reformatDate($oldVariation);

    

    if ($newVariationFormat->toDateString() < $oldVariationFormat->toDateString()) {

        dd('holaaa');

        return true;

    }

    return false;

}

“reformatDate”是将字符串日期转换为 Carbon 类型的函数，如下所示：

private function reformatDate($date) {

    $month = substr($date, 4, 3);

    $month = intval($this->getMonthNumber($month));

    $day = intval(substr($date, 8, 2));

    $year = intval(substr($date, 11, 4));

    $hour = substr($date, 16, 2);

    $minutes = substr($date, 19, 2);

    $seconds = substr($date, 22, 2);

    return Carbon::create($year, $month, $day, $hour, $minutes, $seconds);

}

其中 getMonthNumber():

private function getMonthNumber($month) {

    $monthKeyValues = [

        '1' => 'Jan',

        '2' => 'Feb',

        '3' => 'Mar',

        '4' => 'Apr',

        '5' => 'May',

        '6' => 'Jun',

        '7' => 'Jul',

        '8' => 'Ago',

        '9' => 'Sep',

        '10' => 'Oct',

        '11' => 'Nov',

        '12' => 'Dec',

    ];

    return array_search($month, $monthKeyValues);

}

Answer 1

最近的日期大于较早的日期。所以你必须改变比较的方向。为什么不直接比较 Carbon 对象而不是将它们转换为字符串？尝试这个if&nbsp;($newVariationFormat->greaterThan($oldVariationFormat))前面的代码通常应该返回 true；

Answer 2

Carbon 对象还可以与标准运算符进行比较：if&nbsp;($newVariationFormat&nbsp;>&nbsp;$oldVariationFormat)并且您重新格式化Date可以缩短：private&nbsp;function&nbsp;reformatDate($date)&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;Carbon::parse(preg_replace('/\s+\(.*\)$/',&nbsp;'',&nbsp;$date)); }