function days_diff($date_ini, $date_end, $round = 0) { 

$array_temp = explode("/",$date_ini);
$date_inir = $array_temp[2]."/".$array_temp[1]."/".$array_temp[0];

$array_temp = explode("/",$date_end);
$date_endr = $array_temp[2]."/".$array_temp[1]."/".$array_temp[0];

    $date_inir = strtotime($date_inir); 
    $date_endr = strtotime($date_endr); 

    $date_diff = ($date_endr - $date_inir) / 86400; 

    if($round != 0) 
        return floor($date_diff); 
    else 
        return $date_diff; 
}