Get date list by month, year and day in php

function dates_month($month,$year,$day_name)
{
  $num = cal_days_in_month(CAL_GREGORIAN, $month, $year);
  $dates_month=array();
  for($i=1;$i<=$num;$i++)
  {
   $mktime=mktime(0,0,0,$month,$i,$year);
   $date=date("d-M-Y",$mktime);
   
   // If your day is come with Mon, Tue, etc..
   /*$date_day = date('D',$mktime); 
   if($date_day == $day_name)
   {
      $dates_month[$i]=$date.'day'.$date_day;
   }
   */
   
   // If your day is come with 1,2, etc..
   $date_day = date('w',$mktime); 
   if($date_day == $day_name)
   {
      $dates_month[$i]=$date;
   }
   
  }
  $dates = array_values($dates_month);
  return $dates;
}

echo"<pre>";

print_r(dates_month(2,2015,2)); 

echo"</pre>";