WooCommerce: Rename “Add to Cart” Button if Product Already @ Cart

When talking about UX, or for very specific WooCommerce shops, you might need to “communicate” to the user a product is already in the Cart before re-adding it or increasing its quantity from the Shop/Category/Loop and Single Product pages.

The “Add to Cart” button label comes with a filter (actually 2 filters, one for the Single Product page and another for the other pages such as Shop), so all we need to do is targeting those two, “filter” the label text in case the product is already in the Cart, and return that back to WooCommerce. If this looks like Japanese to you don’t worry – simply copy/paste the snippet below!

PHP Snippet: Rename “Add to Cart” Button if Product Already @ WooCommerce Cart

/**
 * @snippet       Change "Add to Cart" Button Label if Product Already @ Cart
 * @how-to        Watch tutorial @ https://businessbloomer.com/?p=19055
 * @source        https://businessbloomer.com/?p=73974
 * @author        Rodolfo Melogli
 * @testedwith    Woo 3.3.4
 */

// Part 1
// Edit Single Product Page Add to Cart

add_filter( 'woocommerce_product_single_add_to_cart_text', 'bbloomer_custom_add_cart_button_single_product' );

function bbloomer_custom_add_cart_button_single_product( $label ) {
	
	foreach( WC()->cart->get_cart() as $cart_item_key => $values ) {
		$product = $values['data'];
		if( get_the_ID() == $product->get_id() ) {
			$label = __('Already in Cart. Add again?', 'woocommerce');
		}
	}
	
	return $label;

}

// Part 2
// Edit Loop Pages Add to Cart

add_filter( 'woocommerce_product_add_to_cart_text', 'bbloomer_custom_add_cart_button_loop', 99, 2 );

function bbloomer_custom_add_cart_button_loop( $label, $product ) {
	
	if ( $product->get_type() == 'simple' && $product->is_purchasable() && $product->is_in_stock() ) {
		
		foreach( WC()->cart->get_cart() as $cart_item_key => $values ) {
			$_product = $values['data'];
			if( get_the_ID() == $_product->get_id() ) {
				$label = __('Already in Cart. Add again?', 'woocommerce');
			}
		}
		
	}
	
	return $label;
	
}

Where to add this code?

You can place PHP snippets at the bottom of your child theme functions.php file (before "?>" if you have it). CSS, on the other hand, goes in your child theme style.css file. Make sure you know what you are doing when editing such delicate files - if you need more guidance, please take a look at my free WooCommerce Customization video tutorial.

Does this snippet still work?

Please let me know in the comments if everything worked as expected. I would be happy to revise the snippet if you report otherwise (please provide screenshots). I have tested this code with Storefront theme, the WooCommerce version listed above and a WordPress-friendly hosting on PHP 7.

If you think this code saved you time & money, please join other Business Bloomer supporters and avail of 365 days of WooCommerce benefits. Thank you in advance 🙂

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