Find every Sunday between two dates

Question

I have $fromdate and $todate variables. I want a function that can calculate the dates of each Sunday existing in between $fromdate an

Answer 1

Assuming these are date objects, start at $fromdate, add one day to it, until that date is Sunday, and as long as the date is before $todate. Add 7 days to each Sunday you find, add that date and continue as long as the new date is before $todate. Keep track of each date found this way.