how to get sunday date between two date

Question

I try this

Answer 1

Give this a try:

$startDate = new DateTime('2016-07-15');
$endDate = new DateTime('2016-07-17');

$sundays = array();

while ($startDate <= $endDate) {
    if ($startDate->format('w') == 0) {
        $sundays[] = $startDate->format('Y-m-d');
    }
    
    $startDate->modify('+1 day');
}

var_dump($sundays);

If you want later to use the DateTime objects instead of the formatted date, then you must use DateTimeImmutable for the $startDate variable:

$startDate = new DateTimeImmutable('2016-07-15');
$endDate = new DateTimeImmutable('2016-07-17');

$sundays = array();

while ($startDate <= $endDate) {
    if ($startDate->format('w') == 0) {
        $sundays[] = $startDate;
    }
    
    $startDate->modify('+1 day');
}

var_dump($sundays);