dayCount.php

<?php
//return[0] sunday/pazar
function dayCount($start,$end){
	$time = strtotime($start);
	$end = strtotime($end);
	$days = array();
	$day = date("w",$time);
	isset($days[$day])?$days[$day]++ :$days[$day]=1;
	while($time < $end){
		$time = strtotime("+1 day",$time);
		$day = date("w",$time);
		isset($days[$day])?$days[$day]++ :$days[$day]=1;
	}
	ksort($days);
	return $days;
}

var_export(dayCount("2017-11-01","2017-11-30"));

output

array (
  0 => 4,
  1 => 4,
  2 => 4,
  3 => 5,
  4 => 5,
  5 => 4,
  6 => 4,
)