如何查找PHP中另一個日期範圍內的日期範圍內有多少天？

Question

我使用碳PHP庫。重複問題中的答案使用PHP的內置函數。

count how many days within a date range are within another date range

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下面是我用它來找到，如果日期範圍（$userDateStart和$userDateEnd）是與另一個日期範圍（$couponStart and $ couponEnd`）的代碼，它沒有任何錯誤工作正常，但我不知道如何找到這個日期範圍內重疊/存在的日子？

我使用的庫是http://carbon.nesbot.com/docs/

預期的結果應該是4在這case..Hope你會幫我的。

$userDateStart = Carbon::createFromFormat('Y-m-d','2015-06-26'); 
$userDateEnd = Carbon::createFromFormat('Y-m-d','2015-06-29'); 

$couponStart = Carbon::createFromFormat('Y-m-d','2015-06-26'); 
$couponEnd = Carbon::createFromFormat('Y-m-d','2015-10-31'); 

if(($userDateStart >= $couponStart && $userDateEnd <= $couponEnd) || 
    ($couponStart >= $userDateStart && $couponEnd <= $userDateEnd)){ 
    die("Yes,The date is within this date range"); 
} 
die("No,It is not within this date range"); 

Answer 1

根據系統提供的文檔，你需要使用：

$dt = Carbon::create(2012, 4, 30, 0); 
echo $dt->diffInDays($dt->copy()->addMonth()); // 30 
echo $dt->diffInDays($dt->copy()->addWeek()); // 7 

因此，爲了與你的程序的工作我想你需要這樣做：

$userDateStart = Carbon::createFromFormat('Y-m-d','2015-06-26'); 
$userDateEnd = Carbon::createFromFormat('Y-m-d','2015-06-29'); 

$couponStart = Carbon::createFromFormat('Y-m-d','2015-06-26'); 
$couponEnd = Carbon::createFromFormat('Y-m-d','2015-10-31'); 

//Determin the highest date from the starts and the minimum dates from the ends 
$startBetweenDate = $userDateStart->max($couponStart); 
$endBetweenDate = $userDateEnd->min($couponEnd); 

//Now find how many days are between 
echo $startBetweenDate->diffInDays($endBetweenDate); //Should be 4 

請注意：由於我沒有安裝Carbon的庫，因此未進行測試。