rendered paste body $_SESSION['cart'][0]['product_id'] = "CIS1001"; $_SESSION['cart'][0]['category_id'] = "category_2am"; $_SESSION['cart'][0]['feature_id'] = "feature_2am"; $_SESSION['cart'][0]['quantity'] = "500000"; $_SESSION['cart'][1]['product_id'] = "CIS1002"; $_SESSION['cart'][1]['category_id'] = "category_consume"; $_SESSION['cart'][1]['feature_id'] = "feature_consume"; $_SESSION['cart'][1]['quantity'] = "9999999"; function seek_and_ye_shall_find($product_id, $category_id,$feature_id) { for ($i=0; $i<count($_SESSION['cart']); $i++) { if (in_array(array($product_id, $category_id,$feature_id), $_SESSION['cart'][$i])) { echo $_SESSION['cart'][$i]['quantity']; } } } seek_and_ye_shall_find("CIS1002", "category_consume","feature_consume");