How to calculate the days of the past week (function) PHP?

Question

PHP

Please help me write a function so that, taking into account all the calendar nuances (leap year code, 28-30-31 days in a month, etc.), the number of posts written by a certain author in WP is counted for the WHOLE PAST WEEK.

Answer 1

$rangeStart = new \DateTime('Monday last week');
$rangeEnd = new \DateTime('Sunday last week')

php.net/manual/en/datetime.formats.relative.php
then we select posts between two dates.