Mine

                 $used_ids = array();                    if(mysql_num_rows($rsfeaProducts) != 0) {                        for($i=1;$i <= 4;$i++) {                            $product_id = $row_id[mt_rand(0,(count($row_id)-1))];// while loop for displaying products correctly on tables                            while(in_array($product_id, $used_ids)) {                                $gen_rand = mt_rand(0,(count($row_id)-1));                                $product_id = $row_id[$gen_rand];                            }                            $used_ids[] = $product_id;                            $SQLq = mysql_query("SELECT `product_id`, `product_image`, `product_name` FROM `sur_products` WHERE `product_id`='{$product_id}' LIMIT 1");                            $resfeaProducts = mysql_fetch_assoc($SQLq);