Add product to cart wordpress

Add product to cart wordpress

```
add_action( 'template_redirect', 'bbloomer_add_product_to_cart_automatically' );
   
function bbloomer_add_product_to_cart_automatically() {
   $product_id = $_GET["pt"]; // This variable contains the code of the product that you want to add to the cart.
	WC()->cart->empty_cart(); // This step is required, if what you want is to allow only one product at a time
  // if cart empty, add it to cart  
   if ( WC()->cart->get_cart_contents_count() == 0 ) { // This step is required, if what you want is to allow only one product at a time
      WC()->cart->add_to_cart( $product_id ); // Add product
   }
}
```