How to determine the date if you know the year, month, day of the week?

Question

PHP

How to determine the specific date of the month, knowing the month, year and day of the week.
For example: 2016, August, Monday.
How to get the date of the first Monday in August?

Answer 1

echo (new DateTime($year . '-' . $month))
      ->modify('first ' . $day ' . of this month') // first monday of this month
      ->format(\DateTime::ATOM);

Answer 2

Thank you!