woocommerce discount based on quantity / woocommerce discount for multiple items / woocommerce discount for quantity
Apply a Woocommerce TOTAL CART discount to all the items in the cart, depending on the quantity of items added.
Scenario:
- If no of items in the cart are between 9-12, Apply 5% Discount to all items.
- If no of items in the cart are between 13-16, Apply 10% Discount to all items.
- The discount’s should not stack. e.g. when 12 items in cart, apply 5% discount…when 13 items added, remove 5% discount and apply 10% discount.
1) By cart item quantity:
// Utility function that give the discount percentage based on quantity argument
function get_discount_percent( $quantity ){
if( $quantity < 9 )
$percent = 0; // 0 % ( quantity from 1 to 8 )
elseif( $quantity >= 9 && $quantity < 13 )
$percent = 5; // 5 % ( quantity from 9 to 12 )
else
$percent = 10; // 10 % ( quantity up to 13 )
return $percent;
}
add_filter('woocommerce_add_cart_item_data', 'add_items_default_price_as_custom_data', 20, 3 );
function add_items_default_price_as_custom_data( $cart_item_data, $product_id, $variation_id ){
$product_id = $variation_id > 0 ? $variation_id : $product_id;
## ----- YOUR SETTING ----- ##
$percent_1 = 5; // Discount (5%)
$percent_2 = 10; // Discount (10%)
// The WC_Product Object
$product = wc_get_product($product_id);
$price = (float) $product->get_price();
// Set the Product default base price as custom cart item data
$cart_item_data['discount'][0] = $price;
// Set the Product discounted price of 5% as custom cart item data
$cart_item_data['discount'][$percent_1] = $price * (100 - $percent_1) / 100;
// Set the Product discounted price of 10% as custom cart item data
$cart_item_data['discount'][$percent_2] = $price * (100 - $percent_2) / 100;
return $cart_item_data;
}
// Display the product original price
add_filter('woocommerce_cart_item_price', 'display_cart_items_default_price', 20, 3 );
function display_cart_items_default_price( $product_price, $cart_item, $cart_item_key ){
if( isset($cart_item['discount'][0]) ) {
$product = $cart_item['data'];
$product_price = wc_price( wc_get_price_to_display( $product, array( 'price' => $cart_item['discount'][0] ) ) );
}
return $product_price;
}
// Display the product name with the discount percentage
add_filter( 'woocommerce_cart_item_name', 'append_percetage_to_item_name', 20, 3 );
function append_percetage_to_item_name( $product_name, $cart_item, $cart_item_key ){
// get the percent based on quantity
$percent = get_discount_percent($cart_item['quantity']);
if( isset($cart_item['discount'][$percent]) && isset($cart_item['discount'][0]) ) {
if( $cart_item['data']->get_price() != $cart_item['discount'][0] )
$product_name .= ' <em>(' . $percent . '% discounted)</em>';
}
return $product_name;
}
add_action( 'woocommerce_before_calculate_totals', 'set_custom_discount_cart_item_price', 25, 1 );
function set_custom_discount_cart_item_price( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
foreach( $cart->get_cart() as $cart_item ){
// get the percent based on quantity
$percentage = get_discount_percent($cart_item['quantity']);
// For items non on sale set a discount based on quantity as defined in
if( $percentage != 0 && isset($cart_item['discount'][$percentage]) && ! $cart_item['data']->is_on_sale() ) {
$cart_item['data']->set_price($cart_item['discount'][$percentage]);
}
}
}
Or all (discount based on quantity) in one function:
add_action( 'woocommerce_before_calculate_totals', 'custom_discounted_cart_item_price', 10, 1 );
function custom_discounted_cart_item_price( $cart_object ) {
$discount_applied = false;
// Set Here your targeted quantity discount
$t_qty = 12;
// Iterating through each item in cart
foreach ( $cart_object->get_cart() as $item_values ) {
## Get cart item data
$item_id = $item_values['data']->id; // Product ID
$item_qty = $item_values['quantity']; // Item quantity
$original_price = $item_values['data']->price; // Product original price
// Getting the object
$product = new WC_Product( $item_id );
// CALCULATION FOR EACH ITEM
// when quantity is up to the targetted quantity and product is not on sale
if( $item_qty >= $t_qty && !$product->is_on_sale() ){
for($j = $t_qty, $loops = 0; $j <= $item_qty; $j += $t_qty, $loops++);
$modulo_qty = $item_qty % $t_qty; // The remaining non discounted items
$item_discounted_price = $original_price * 0.9; // Discount of 10 percent
$total_discounted_items_price = $loops * $t_qty * $item_discounted_price;
$total_normal_items_price = $modulo_qty * $original_price;
// Calculating the new item price
$new_item_price = ($total_discounted_items_price + $total_normal_items_price) / $item_qty;
// Setting the new price item
$item_values['data']->price = $new_item_price;
$discount_applied = true;
}
}
// Optionally display a message for that discount
if ( $discount_applied )
wc_add_notice( __( 'A quantity discount has been applied on some cart items.', 'my_theme_slug' ), 'success' );
}
2) Globally on cart item count (for non on sale products):
// Utility function that give the discount percentage based on quantity argument
function get_discount_percent( $quantity ){
if( $quantity < 9 )
$percent = 0; // 0 % ( quantity from 1 to 8 )
elseif( $quantity >= 9 && $quantity < 13 )
$percent = 5; // 5 % ( quantity from 9 to 12 )
else
$percent = 10; // 10 % ( quantity up to 13 )
return $percent;
}
// Utility function that count cart items that are not on sale
function get_non_on_sale_cart_items_count(){
$items_count = 0;
foreach( WC()->cart->get_cart() as $cart_item ){
if( ! $cart_item['data']->is_on_sale() ){
$items_count += $cart_item['quantity'];
}
}
return $items_count;
}
add_filter('woocommerce_add_cart_item_data', 'add_items_default_price_as_custom_data', 20, 3 );
function add_items_default_price_as_custom_data( $cart_item_data, $product_id, $variation_id ){
$product_id = $variation_id > 0 ? $variation_id : $product_id;
## ----- YOUR SETTING ----- ##
$percent_1 = 5; // Discount (5%)
$percent_2 = 10; // Discount (10%)
// The WC_Product Object
$product = wc_get_product($product_id);
$price = (float) $product->get_price();
// Set the Product default base price as custom cart item data
$cart_item_data['discount'][0] = $price;
// Set the Product discounted price of 5% as custom cart item data
$cart_item_data['discount'][$percent_1] = $price * (100 - $percent_1) / 100;
// Set the Product discounted price of 10% as custom cart item data
$cart_item_data['discount'][$percent_2] = $price * (100 - $percent_2) / 100;
return $cart_item_data;
}
// Display the product original price
add_filter('woocommerce_cart_item_price', 'display_cart_items_default_price', 20, 3 );
function display_cart_items_default_price( $product_price, $cart_item, $cart_item_key ){
if( isset($cart_item['discount'][0]) ) {
$product = $cart_item['data'];
$product_price = wc_price( wc_get_price_to_display( $product, array( 'price' => $cart_item['discount'][0] ) ) );
}
return $product_price;
}
// Display the product name with the discount percentage
add_filter( 'woocommerce_cart_item_name', 'append_percetage_to_item_name', 20, 3 );
function append_percetage_to_item_name( $product_name, $cart_item, $cart_item_key ){
// Get cart items count
$items_count = get_non_on_sale_cart_items_count();
// get the percent based on quantity
$percent = get_discount_percent($items_count);
if( isset($cart_item['discount'][$percent]) && isset($cart_item['discount'][0]) ) {
if( $cart_item['data']->get_price() != $cart_item['discount'][0] )
$product_name .= ' <em>(' . $percent . '% discounted)</em>';
elseif ( $cart_item['data']->is_on_sale() && $percent != 0 ){
$product_name .= ' <em>(Item on sale)</em>';
}
}
return $product_name;
}
// Change cart item price
add_action( 'woocommerce_before_calculate_totals', 'set_custom_discount_cart_item_price', 25, 1 );
function set_custom_discount_cart_item_price( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
// Get cart items count
$items_count = get_non_on_sale_cart_items_count();
// get the percent based on quantity
$percentage = get_discount_percent($items_count);
foreach( $cart->get_cart() as $cart_item ){
// For items non on sale set a discount based on quantity as defined in
if( $percentage != 0 && isset($cart_item['discount'][$percentage]) && ! $cart_item['data']->is_on_sale() ) {
$cart_item['data']->set_price($cart_item['discount'][$percentage]);
}
}
}
3) add a discount to the whole cart by apply a negative fee
add_action( 'woocommerce_before_calculate_totals', 'custom_discounted_cart_item_price', 20, 1 );
function custom_discounted_cart_item_price( $cart ) {
$total_cart_items_count = $cart->get_cart_contents_count();
$discount = null;
// Apply 5% discount between 9 - 12 items
if( $total_cart_items_count >= 9 && $total_cart_items_count <= 12 ) {
// Calculate 5% of cart total
$discount = $cart->get_cart_contents_total() * 5 / 100;
}
// Apply 10% discount between 13 - 16 items
if( $total_cart_items_count >= 13 && $total_cart_items_count <= 16 ) {
// Calculate 10% of cart total
$discount = $cart->get_cart_contents_total() * 10 / 100;
}
if( !empty( $discount ) ) {
$cart->add_fee(
__( 'Discount', 'woocommerce' ) . '($percent%)',
-$discount,
false // TAX
);
}
}
source https://stackoverflow.com/questions/52363715/cart-item-quantity-progressive-percentage-discount-in-woocommerce-3/52370789#52370789