Fix for “Sold Individually” Products

Fix for “Sold Individually” Products

add_filter( 'woocommerce_product_add_to_cart_url', 'elftoy_fix_for_individual_products', 10, 2 );
function elftoy_fix_for_individual_products( $add_to_cart_url, $product ){
 
	if( $product->get_sold_individually() // if individual product
	&& WC()->cart->find_product_in_cart( WC()->cart->generate_cart_id( $product->id ) ) // if in the cart
	&& $product->is_purchasable() // we also need these two conditions
	&& $product->is_in_stock() ) {
		$add_to_cart_url = wc_get_checkout_url();
	}
 
	return $add_to_cart_url;
 
}