Allow Only One Product in the Cart
Replaces the cart contents whenever a new product is added, so each order contains a single product. Useful for services, bookings and memberships.
Opens WPIDE on
Code
add_filter( 'woocommerce_add_to_cart_validation', function ( $passed, $product_id ) {
if ( $passed && WC()->cart && ! WC()->cart->is_empty() ) {
foreach ( WC()->cart->get_cart() as $key => $item ) {
if ( (int) $item['product_id'] !== (int) $product_id ) {
WC()->cart->remove_cart_item( $key );
}
}
}
return $passed;
}, 20, 2 );Notes
Shoppers can still change the quantity of the product in their cart.
How to add this snippet
- Install WPIDE on your WordPress site (it is free) and open Code Snippets.
- Use snippet above adds it from the library in one click. Or copy the code into a new snippet with the same code type.
- It is added inactive: review the code and settings, then switch it on.