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At first we need to create two

datetime

objects using

createFromFormat

static method of

DateTime

built-in class

$first_date = DateTime::createFromFormat('Y-m-d', "2020-12-23");
$second_date = DateTime::createFromFormat('Y-m-d', "2020-12-30");

Using

diff()

method of

DateTime

class we actually calculate differences between the two dates and we get the result in days

$difference_between_the_days = $second_date->diff($first_date)->format("%a");
	
echo $difference_between_the_days;

by Valeri Tandilashvili

PHP

datetime

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