Need to make sure customers are not adding the same item to their cart again? Let them know the item is already added to their cart.
![woocommerce add to cart button](https://zeropointdevelopment.com/wp/wp-content/uploads/2020/11/woocoomerce-add-to-cart.png)
Once you add the code snippet below, you can check to see if the item is already in the cart and add a warning message on the add to cart button.
![woocommerce already in card - add again](https://zeropointdevelopment.com/wp/wp-content/uploads/2020/11/woocoomerce-already-in-cart-add-again.png)
Where To Put The Code Snippet?
This code snippet should go in your active theme’s functions.php file.
Add it to the bottom of the file, before any closing ?> characters.
It’s always a good idea to take a backup of your functions.php file in case anything goes wrong – you can just copy the old code back in again.
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