add_action( 'woocommerce_add_to_cart', 'check_product_added_to_cart', 10, 6 );
function check_product_added_to_cart($cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data) {
// Set HERE your targeted product ID
$target_product_ids1 = array(31, 32);
$target_product_ids2 = array(33, 34);
// Set HERE the product ID to remove
$item_id_to_remove1 = 37;
$item_id_to_remove2 = 53;
// Initialising some variables
$has_item1 = $has_item2 = $is_product_id1 = $is_product_id2 = false;
foreach( WC()->cart->get_cart() as $key => $item ){
// Check if the item to be removed 1 is in cart
if( $item['product_id'] == $item_id_to_remove1 ){
$has_item1 = true;
$key_to_remove1 = $key;
}
// Check if the item to be removed 2 is in cart
if( $item['product_id'] == $item_id_to_remove2 ){
$has_item2 = true;
$key_to_remove2 = $key;
}
// Check if we added to cart any targeted product IDs 1
if( in_array( $product_id, $target_product_ids1 ) ){
$is_product_id1 = true;
}
// Check if we added to cart any targeted product IDs 2
if( in_array( $product_id, $target_product_ids2 ) ){
$is_product_id2 = true;
}
}
if( $has_item1 && $is_product_id1 ){
WC()->cart->remove_cart_item($key_to_remove1);
// Optionaly displaying a notice for the removed item:
wc_add_notice( __( 'The product 1 "blab bla" has been removed from cart.', 'theme_domain' ), 'notice' );
}
if( $has_item2 && $is_product_id2 ){
WC()->cart->remove_cart_item($key_to_remove2);
// Optionaly displaying a notice for the removed item:
wc_add_notice( __( 'The product 2 "blab bla" has been removed from cart.', 'theme_domain' ), 'notice' );
}
}