Add a product tab to Woocommerce with a checkbox to add functionality to add a second "Add to Cart".

Question

I could use some help from you, thank you very much for your efforts!

My problem is that the installed plugin replaces the standard add to cart button on the product page. I don't want to change it and I need to add a second add to cart button below it. The problem is, another plugin for free product samples requires a regular add to cart button.

When I add the global script it works on all products.

Add_action( 'woocommerce_product_meta_start', 'woocommerce_template_single_add_to_cart, 1 );

I would like this feature added to the product tab and can be enabled or disabled on selected products via a checkbox.

So far, my code has done nothing. The checkboxes work and the checkboxes save fine. But the code snippet does not execute the add to cart command on the product frontend page.

// Add checkbox field to the Product tab in the admin area

function add_checkbox_to_product_tab() {

    // Add checkbox field to the General tab

    woocommerce_wp_checkbox( array(

        'id' => 'add_to_cart_checkbox',

        'label' => 'Warenkorb Hinzufügen',

                'desc_tip' => false, // true or false, show description directly or as tooltip

        'description' => 'ja'

    ) );

}

add_action( 'woocommerce_product_options_general_product_data', 'add_checkbox_to_product_tab' );

 

// Save checkbox field value

function save_checkbox_value( $product ) {

    $checkbox = isset( $_POST['add_to_cart_checkbox'] ) ? 'yes' : 'no';

    $product->update_meta_data( 'add_to_cart_checkbox', $checkbox );

}

add_action( 'woocommerce_admin_process_product_object', 'save_checkbox_value' );

 

// Add action when checkbox is selected with 'yes'

function add_action_when_checkbox_selected( $product_id ) {

    $checkbox_value = get_post_meta( $product_id, '_add_to_cart_checkbox', true );

    if ( $checkbox_value == 'yes' ) {

        do_action( 'woocommerce_product_meta_start' );

        do_action( 'woocommerce_template_single_add_to_cart' );

    }

}

add_action( 'woocommerce_template_single_add_to_cart', 'add_action_when_checkbox_selected', 1 );

Answer 1

You can use the `woocommerce_product_meta_start` hook. Please see the code below.

// Add a checkbox field to the Product tab in the admin area
function add_checkbox_to_product_tab() {
    // Add checkbox field to the General tab
    woocommerce_wp_checkbox( array(
        'id' => 'add_to_cart_checkbox',
        'label' => 'Warenkorb Hinzufügen',
        'desc_tip' => false,
        'description' => 'ja'
    ) );
}
add_action( 'woocommerce_product_options_general_product_data', 'add_checkbox_to_product_tab' );

// Save checkbox field value
function save_checkbox_value( $product ) {
    $checkbox = isset( $_POST['add_to_cart_checkbox'] ) ? 'yes' : 'no';
    $product->update_meta_data( 'add_to_cart_checkbox', $checkbox );
}
add_action( 'woocommerce_admin_process_product_object', 'save_checkbox_value' );

// Remove standard "Add to Cart" button if checkbox value is 'no'
function add_custom_add_to_cart_button() {
    global $product;
    $checkbox_value = $product->get_meta( 'add_to_cart_checkbox' );
    if ( $checkbox_value == 'yes' ) {
        // Add your custom "Add to Cart" button code here
        echo '<a href="' . esc_url( $product->add_to_cart_url() ) . '" class="button alt">Custom Add to Cart</a>';
    }
}
add_action( 'woocommerce_product_meta_start', 'add_custom_add_to_cart_button', 40 );

After testing, the code is valid.