Pre-fill Woocommerce checkout fields with Url variables saved in session

Question

When people enter the my woocommerce shop following a link in an sales email with email and name as parameters I would like to prefill the name and email in the checkout pag

Answer 1

Here below, you will find the correct working code, to save user data from an URL (GET) into WooCommerce sessions and to autofill with that data the related checkout fields.

URL will be like: http://example.com/sales-page/?tu_em=name@example.com&tu_name=theFirstName

This can be done from any URL as the code will detect the URL variable, when they are set.

The code;

// Save user data from URL to Woocommerce session
add_action( 'template_redirect', 'set_custom_data_wc_session' );
function set_custom_data_wc_session () {
    if ( isset( $_GET['tu_em'] ) || isset( $_GET['tu_name'] ) ) {
        $em   = isset( $_GET['tu_em'] )   ? esc_attr( $_GET['tu_em'] )   : '';
        $name = isset( $_GET['tu_name'] ) ? esc_attr( $_GET['tu_name'] ) : '';

        // Set the session data
        WC()->session->set( 'custom_data', array( 'email' => $em, 'name' => $name ) );
    }
}

// Autofill checkout fields from user data saved in Woocommerce session
add_filter( 'woocommerce_billing_fields' , 'prefill_billing_fields' );
function prefill_billing_fields ( $address_fields ) {
    // Get the session data
    $data = WC()->session->get('custom_data');

    // Email
    if( isset($data['email']) && ! empty($data['email']) )
        $address_fields['billing_email']['default'] = $data['email'];

    // Name
    if( isset($data['name']) && ! empty($data['name']) )
        $address_fields['billing_first_name']['default'] = $data['name'];

    return $address_fields;
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.

Answer 2

Shipping information(send to another address) by default is auto we use that for autofill billing fildes

add_filter( 'woocommerce_checkout_fields' , 'ahmadyani_checkout_field_defaults', 20 );
function ahmadyani_checkout_field_defaults( $fields ) {
    $user = get_user_meta(get_current_user_id());
    $first_name = $user ? $user['shipping_first_name'][0] : '';
    $last_name = $user ? $user['shipping_last_name'][0] : '';
    $company = $user ? $user['shipping_company'][0] : '';
    $shipping_address_1 = $user ? $user['shipping_address_1'][0] : '';
    $shipping_address_2 = $user ? $user['shipping_address_2'][0] : '';
    $shipping_city = $user ? $user['shipping_city'][0] : '';
    $shipping_state = $user ? $user['shipping_state'][0] : '';
    $shipping_postcode = $user ? $user['shipping_postcode'][0] : '';
    $fields['billing']['billing_first_name']['default'] = $first_name;
    $fields['billing']['billing_last_name']['default'] = $last_name;
    $fields['billing']['billing_company']['default'] = $company;
    $fields['billing']['billing_address_1']['default'] = $shipping_address_1;
    $fields['billing']['billing_address_2']['default'] = $shipping_address_2;
    $fields['billing']['billing_city']['default'] = $shipping_city;
    $fields['billing']['billing_state']['default'] = $shipping_state;
    $fields['billing']['billing_postcode']['default'] = $shipping_postcode;
    return $fields;
}