$_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");