To calculate the difference between two dates using Carbon in PHP, you can use the diff() method of the Carbon instance. The diff() method returns a DateInterval object that represents the difference between two dates.
Here's an example to calculate the difference between two dates using Carbon:
use Carbon\Carbon;
$startDate = Carbon::parse('2022-01-01');
$endDate = Carbon::now();
$diff = $startDate->diff($endDate);
echo $diff->format('%y years, %m months, %d days'); // Output: 0 years, 1 months, 12 days
In the above example, Carbon::parse() is used to create a Carbon instance for the $startDate and Carbon::now() is used to create a Carbon instance for the current date/time as the $endDate.
Then, the diff() method is called on the $startDate instance, passing the $endDate as the argument. This will return a DateInterval object representing the difference between the two dates.
Finally, the format() method is called on the $diff object to format the difference in the desired format. In the example, %y represents the number of years, %m represents the number of months, and %d represents the number of days.