PHP: Loop through dates (from date to date) with strtotime() function

This is very easy way loop through dates (from date to date) with PHP strtotime() function. This example only echo dates, but of course this model can be used more complicated situations.

<?php

 
 

 // Start date
 $date = '2009-12-06';
 // End date
 $end_date = '2020-12-31';

 while (strtotime($date) <= strtotime($end_date)) {
                echo "$date\n";
                $date = date ("Y-m-d", strtotime("+1 day", strtotime($date)));
 }

?>