<?php

function get_range_dates($ini, $end, $format_ini = 'Y-m-d', $format_end = 'Y-m-d')
{
	$start = DateTime::createFromFormat($format_ini, $ini);
	$finish = DateTime::createFromFormat($format_end, $end);
	$interval = new DateInterval('P1D'); // de um dia para o próximo
	return new DatePeriod($start, $interval, $finish->modify('+1 day'));
}

$dates = (get_range_dates('02/04/2019','25/04/2019','d/m/Y','d/m/Y'));

foreach($dates as $date)
{
	echo $date->format('Y-m-d');
	echo PHP_EOL;
}