yardımınız için çok teşekkürler ama ne yazık ki bu kod istediğim sonucu vermedi. kodların tamamını atıyorum :

<?php
require_once 'config.php';

/*********************************************************
*                 PRODUCT FUNCTIONS 
**********************************************************/


/*
    Get detail information of a product
*/
function getProductDetail($pdId)
{
    
    $_SESSION['shoppingReturnUrl'] = $_SERVER['REQUEST_URI'];
    
    // get the product information from database
    $sql = "SELECT pd_name, pd_description, pd_price, pd_image, pd_image2, pd_image3, pd_image4, pd_qty
            FROM tbl_product
            WHERE pd_id = $pdId";
    
    $result = dbQuery($sql);
    $row    = dbFetchAssoc($result);

    extract($row);
    
    $row['pd_description'] = nl2br($row['pd_description']);
    
    if ($row['pd_image']) {
        $row['pd_image'] = WEB_ROOT . 'images/product/' . $row['pd_image'];
    } else {
        $row['pd_image'] = WEB_ROOT . 'images/no-image-large1.png';
    }

if ($row['pd_image2']) {
        $row['pd_image2'] = WEB_ROOT . 'images/product/' . $row['pd_image2'];
    } else {
        $row['pd_image2'] = WEB_ROOT . 'images/no-image-large1.png';
    }

if ($row['pd_image3']) {
        $row['pd_image3'] = WEB_ROOT . 'images/product/' . $row['pd_image3'];
    } else {
        $row['pd_image3'] = WEB_ROOT . 'images/no-image-large1.png';
    }

    if ($row['pd_image4']) {
        $row['pd_image4'] = WEB_ROOT . 'images/product/' . $row['pd_image4'];
    } else {

                $row['pd_image4'] = WEB_ROOT . 'images/no-image-large1.png';
                
        
    }

    
    return $row;            
}



?>