<?php function rejected_date($date) {
    
    $rejectedDate = [null, "0000-00-00", "", "1970-01-01", "0000-11-30"];
    $currentYear = date("Y");
    $dateYear = date("Y", strtotime($date));
    $differentYear = $currentYear - $dateYear;
    if(in_array($date, $rejectedDate)) {
        return true;
    } else {
        if($differentYear > -20 && $differentYear < 100) { //mevcut yıldan 2 yıl eksiğine ait kayda izin ver
            return false;
        } else {
            return true;
        }
        
    }
} ?>