$plusDays = #שוטף#;
list($day, $month, $year) = explode(‘/’, #תאריכי אירוע#);
if($month == 12){
$nextMonth = 01;
$nextYear = $year + 1;
}else{
$nextMonth = $month + 1;
$nextYear = $year;
}
if($nextMonth < 10){
$shotef = "01" . "/" . '0' . $nextMonth . "/" . $nextYear ;
}else{
$shotef = "01" . "/" . $nextMonth . "/" . $nextYear ;
}
$timestamp = strtotime(str_replace('/', '-', $shotef));
$shotefPlus = date('d/m/Y', strtotime('+' . (int)$plusDays. ' days', time()));
$payCon = #תנאי תשלום#;

if($payCon == "מיידי"){
$dueDate= #תאריך האירוע#;
}elseif($payCon == "שוטף"){
$dueDate= shotef;
}else{
$dueDate= shotefPlus;
}

return htmlentities($dueDate);