用Carbon增加日期 [英] Incrementing dates with Carbon

问题描述

我正在尝试为Laravel 4中的预订系统创建一个停电日期数组.我的数据库中有一个测试行，其开始日期为2016-01-24，结束日期为2016-01-29.

这是使用Carbon将行增加一天并增加日期的行和循环代码.将其添加到数组:

$reserved = Reservation::where('property_id', $property->id)->get();

$blackoutDays = [];

foreach($reserved as $r)
{
    $start = new \Carbon\Carbon($r->start_date);
    $end = new \Carbon\Carbon($r->end_date);
    $days = $start->diff($end)->days;

    for($i = 0; $i <= $days; $i++)
    {
        $date = '';
        $date = $start->addDays($i);

        $blackoutDays[] = $date->format('Y-m-j');
    }
}

我想要在$ blackoutDays中获得的是:

["2016-01-24"，"2016-01-25"，"2016-01-26"，"2016-01-27"，"2016-01-28"，"2016-01-29 ]

但是我实际上得到的是:

["2016-01-24"，"2016-01-25"，"2016-01-27"，"2016-01-30"，"2016-02-3"，"2016-02-8 ]

有人知道为什么会这样/如何解决吗?有更好的方法吗?

解决方案

在for循环的每次运行中，您都会递增$i.因此，它在第一次运行中添加了1，在第二次运行中添加了2天，在第三次运行中添加了3天，依此类推.

因此，您要替换

$date = $start->addDays($i);

使用

$date = $start->addDays(1);

您可能会陷入困境的想法是，每次调用都从$start日期对象中添加日期，但事实并非如此，因为该对象不是"

I'm trying to create an array of blackout dates for a reservation system in Laravel 4. There is one test row in my db with a start_date of 2016-01-24 and end_date of 2016-01-29.

This is the code that pulls the row and loops through the dates using Carbon to increment by one day & add it to an array:

$reserved = Reservation::where('property_id', $property->id)->get();

$blackoutDays = [];

foreach($reserved as $r)
{
    $start = new \Carbon\Carbon($r->start_date);
    $end = new \Carbon\Carbon($r->end_date);
    $days = $start->diff($end)->days;

    for($i = 0; $i <= $days; $i++)
    {
        $date = '';
        $date = $start->addDays($i);

        $blackoutDays[] = $date->format('Y-m-j');
    }
}

What I'm trying to get in $blackoutDays is:

["2016-01-24", "2016-01-25", "2016-01-26", "2016-01-27", "2016-01-28", "2016-01-29"]

But what I'm actually getting is this:

["2016-01-24", "2016-01-25", "2016-01-27", "2016-01-30", "2016-02-3", "2016-02-8"]

Does anyone know why this is happening / how to fix it? Is there a better way of doing this?

解决方案

You do increment $i every run of your for loop. So it adds 1 in the first run, 2 days in the second, 3 days in the third and so on.

Therefore, you want to replace

$date = $start->addDays($i);

with

$date = $start->addDays(1);

Where you probably fell into the pit is the idea that the days are added from the $start date object on every call, but this is not the case, as this object is not "Immutable".

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