Generate link to product id

bear in mind that i haven’t test this…. just thinking a little stream of consciousness. you can add a second add to cart button I think by duplicating the existing button and adding it to the woocommerce_after_add_to_cart_form hook. then maybe do a string replace on the URL. this is a duplicate of the add to cart form for a “simple” product type.

totally untested, but i think it is in the right direction based on what you asked. good luck.

function kia_add_duplicate_button(){ 

	<?php

		/* edit these two variables*/
		$domain = "example.com";
		$subdomain = "sub.example.com";

		$cart_url = str_replace( $domain, $subdomain, $product->add_to_cart_url() );
	?>

	<form action="<?php echo esc_url( $cart_url ); ?>" class="cart" method="post" enctype='multipart/form-data'>

	 	<?php do_action('woocommerce_before_add_to_cart_button'); ?>

	 	<?php
	 		if ( ! $product->is_sold_individually() )
	 			woocommerce_quantity_input( array( 'min_value' => 1, 'max_value' => $product->backorders_allowed() ? '' : $product->get_stock_quantity() ) );
	 	?>

	 	<button type="submit" class="single_add_to_cart_button button alt"><?php echo apply_filters('single_add_to_cart_text', __( 'Add to cart', 'woocommerce' ), $product->product_type); ?></button>

	 	<?php do_action('woocommerce_after_add_to_cart_button'); ?>

	</form>
<?php }
add_action('woocommerce_after_add_to_cart_form','kia_add_duplicate_button');

Thanks very much for taking the time to look at this. I’ve tried the above code but get this error:

Fatal error: Call to a member function add_to_cart_url() on a non-object in C:\xampp\htdocs\wordpress\wp-content\themes\childtheme\functions.php on line 50

Line 50 is:
$cart_url = str_replace( $domain, $subdomain, $product->add_to_cart_url() );

I’m afraid that resolving this is beyond me so your help would be greatly appreciated!

hmmm…. forgot to globally declare $product. I still don’t know if it will work and can’t really debug it. hope it helps.

function kia_add_duplicate_button(){ 

 global $product;

	<?php

		/* edit these two variables*/
		$domain = "example.com";
		$subdomain = "sub.example.com";

		$cart_url = str_replace( $domain, $subdomain, $product->add_to_cart_url() );
	?>

	<form action="<?php echo esc_url( $cart_url ); ?>" class="cart" method="post" enctype='multipart/form-data'>

	 	<?php do_action('woocommerce_before_add_to_cart_button'); ?>

	 	<?php
	 		if ( ! $product->is_sold_individually() )
	 			woocommerce_quantity_input( array( 'min_value' => 1, 'max_value' => $product->backorders_allowed() ? '' : $product->get_stock_quantity() ) );
	 	?>

	 	<button type="submit" class="single_add_to_cart_button button alt"><?php echo apply_filters('single_add_to_cart_text', __( 'Add to cart', 'woocommerce' ), $product->product_type); ?></button>

	 	<?php do_action('woocommerce_after_add_to_cart_button'); ?>

	</form>
<?php }
add_action('woocommerce_after_add_to_cart_form','kia_add_duplicate_button');

Thanks, that got the code working and it displays the two buttons but they both go to the default cart. (I’ve been testing it here: https://webandtechstuff.com/shop/test-product/)

The approach I initially tried was to insert an extra button using this:

add_action('woocommerce_simple_add_to_cart', 'JRinsert_extra_addtocart_button', 31);

function JRinsert_extra_addtocart_button() {
	echo '<div id="extra-addtocart-button">
		<form class="cart" method="link" action="https://subdomain.example.com">
		<button class="single_add_to_cart_button button alt" type="submit" >Add to cart</button>
		</div>';

This sets up the button as a link to the subdomain. I was then hoping to be able to append the product url at the end of the domain using some kind of variation on either the Woocommerce shortcode:

[add_to_cart_url id="41"]

or by writing out the full link itself and somehow generating the product id of the current product:
https://webandtechstuff.com/?add-to-cart=41

This last one would work if there was a way to generate the product id of the current product somehow?

That’s as far as I got before I had torn all my hair out so if I can’t find another solution I’m probably going to have to hard code the buttons in one by one as my top example above by pasting the html into the ‘product short description’. It’s a real hack but it does work…

So any further input you can add here would be great!

apparently the add_to_cart() method doesn’t include the full URL? we could filter that to use absolute URLs. then what i have might work.

function kia_filter_cart_url( $url ) {
     return add_query_arg( 'add-to-cart', $this->id, get_permalink( $this->id ) );
}
add_filter('woocommerce_add_to_cart_url','kia_filter_cart_url');

gnite!

Thanks, no you’re right it doesn’t. I tried adding the above code but when the page loads it only loads some parts and is missing the cart buttons, sidebar, reviews and footer, and looking at the source of the page it’s really short with a lot missing so it’s not quite there yet. Any suggestions you may have for what else needs to be done would be warmly received!

that assuredly means there is a PHP parse error somewhere.

I think this one is for the too hard basket! Going to try and find an alternative approach. Thanks for your help.