if conflictOfferAndZone Size echo if die return json_encode size_confl

if (!$conflictOfferAndZoneSize) {
    echo 'if';die;
    return json_encode(['size_conflict' => true]);
} else if ($conflictOfferAndZoneSize == 'promo_not_found') {
    echo 'else';die;
    return json_encode(['promo_not_found' => true]);
}