I’m trying to get form input from the product page to the cart, but no luck so far. This is what I did:

  1. Made a file called custom-input.php with an input field inside.

    <input type="text" id="custom-input" name="custom-input" value="custom-input">
  2. Added the field inside the add to cart form (simple.php) on the product page using an action hook. I only want it to display if the product has a certain tag so there’s an if statement too.

    <?php if ( has_term( 'custom-input-tag', 'product_tag' ) ) {
    do_action( 'woocommerce_add_custom_input' ); 
    } ?>
  3. Added a row inside the table in cart-totals.php to display the form output.

    <tr class="custom-input">
        <th><?php _e( 'Your custom input is', 'woocommerce' ); ?></th>
        <td><!--Custom input field text comes here--></td>

After doing some research inside Woocommerce files I found that they use the WC cart class. It stores user data within sessions. The cart totals for example are retrieved with this code:

   function wc_cart_totals_subtotal_html() {
   echo WC()->cart->get_cart_subtotal();
   <td><?php wc_cart_totals_subtotal_html(); ?></td>

I think this is the way to go, but failed to make a function that puts the form input on my cart page. If anyone has thoughts on this, help would be much appreciated!

Read more here: Get custom form input from page to cart


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