Additional button in Woocommerce shop page and archives - php

Question

I'd like to add a button next to "Add to Cart" on the product page that adds "-sample" to the product URL when clicked.
Example:
You're viewing Product 1's page and the URL is "http://www.example.com/shop/product-1/"
When you click on the button, it adds "-sample" to the URL
"http://www.example.com/shop/product-1-sample/"
How can I achieve this?
Thanks

Answer 1

For woocommerce 3+ (only):
In woocommerce 3 you will use woocommerce_after_shop_loop_item action hook instead, as the hook woocommerce_after_add_to_cart_button will not work anymore.
add_action( 'woocommerce_after_add_to_cart_button', 'add_custom_button', 10, 0 );
function add_custom_button() {
global $product;
$product_link = $product->get_permalink();
$sample_link = substr($product_link, 0, -1) . '-sample/';
echo '<a class="button alt btn-sample" href="' . esc_url( $sample_link ) .'">' . __( "Get a sample", "my_theme_slug" ) . '</a>';
}
Code goes on function.php file of your active child theme (or active theme). Tested and works.
Before woocommerce 3:
This is possible using hook woocommerce_after_add_to_cart_button to add your additional button on product pages, using this custom function:
add_action( 'woocommerce_after_add_to_cart_button', 'add_custom_button', 10, 0 );
function add_custom_button() {
global $product;
$product_link = get_permalink( get_the_id() );
$sample_link = substr($product_link, 0, -1) . '-sample/';
echo '<a class="button alt btn-sample" href="' . esc_url( $sample_link ) .'">' . __( "Get a sample", "my_theme_slug" ) . '</a>';
}
This code goes on function.php file of your active child theme or theme.
This code is tested and fully functional.
Based on this: Add a button after add to cart and redirect it to some custom link in WooCommerce
And this: PHP - How to remove all specific characters at the end of a string?

Answer 2

It's been a long time since the original question, but here's a recent update that works for me, WooCommerce 6.3.1:
/* WooCommerce customization */
add_action( 'woocommerce_after_shop_loop_item', 'custom_select_link', 11 );
function custom_select_link() {
global $product;
// Custom "Select" button.
echo '<a class="custom-button" href="' . esc_url( get_permalink( $product->id ) ) . '"><button class="custom-button"> </button></a>';
}
This answer cites an answer in wordpress.stackexchange.