WooCommerce discount: buy one get one 50% off

  • Open
  • gagandeep
    Participant
    October 8, 2019 at 9:56 am #3376
    gagandeep

    I wish to set up a specific discount on a particular variable products, if customer buys one product they get the another(same) on 50% discount(Buy one get another for 50% off). I’ve tried many discount plugins buy the closest that I have found are:

    Pricing Deals for WooCommerce
    WooCommerce All Discounts Lite
    WooCommerce Extended Coupon Features
    By using these plugins I was able to setup discount on subtotal or discount on a each product but not exactly what I am looking for(Buy 1 get 1 off). There are other pro plugins I don’t want to go for it.

    Is it possible to achieve without purchasing a plugin?

  1. Santosh Kumar
    Keymaster
    Posts: 30
    October 8, 2019 at 9:59 am #3378
    Santosh Kumar

    This version will work globally on all product variations in the cart for this defined variable product:

    add_action('woocommerce_cart_calculate_fees', 'add_custom_discount_2nd_at_50', 10, 1 );
    function add_custom_discount_2nd_at_50( $wc_cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;
    $discount = 0;
    $items_prices = array();
    
    $targeted_product_id = 40;
    
    foreach ( $wc_cart->get_cart() as $key => $cart_item ) {
    if( $cart_item['product_id'] == $targeted_product_id ){
    $qty = intval( $cart_item['quantity'] );
    for( $i = 0; $i < $qty; $i++ )
    $items_prices[] = floatval( $cart_item['data']->get_price());
    }
    }
    $count_items_prices = count($items_prices);
    if( $count_items_prices > 1 ) foreach( $items_prices as $key => $price )
    if( $key % 2 == 1 ) $discount -= number_format($price / 2, 2 );
    
    if( $discount != 0 ){
    wc_clear_notices();
    wc_add_notice( __("You get 50% of discount on the 2nd item"), 'notice');
    
    $wc_cart->add_fee( 'Discount 2nd at 50%', $discount, true );
    # Note: Last argument in add_fee() method is related to applying the tax or not to the discount (true or false)
    }
    }

    Code goes in function.php file of your active child theme (or theme) or also in any plugin file.

    This code is tested on Woocommerce 3+ and works.