How to find out what are the months between dates in PHP?

Question

PHP

There are two dates a = 01/01/2021 and b = 03/20/2021, how to find out what months are there and how many days will there be in this month?
The result should be something like this: [01=>31.02=>28.03=>20]

Answer 1

https://www.php.net/manual/ru/ref.datetime.php very useful thing)