Unsetting conditionally custom checkout fields in WooCommerce

Question

In WooCommerce checkout form I have customized the fields. However I don't want display these fields if a product belongs to a specific category. I have that part working.

Next I would like to unset some custom checkout fields, but I can't figure out how or now. Unsetting a normal checkout field is easy and I use for example the following code:

unset( $fields['billing']['billing_company'] );

However for a custom checkout field It doesn't work. Here is how I have set this custom field:

    function company_details_section($checkout)
{
    woocommerce_form_field('delegate_1_name', array(
        'type' => 'text',
        'class' => array(
            'my-field-class form-row-wide delegateExists'
        ) ,
        'label' => __('Full name') ,
    ) , $checkout->get_value('delegate_1_name'));
}

As this belongs to its own section, and not the billing, shipping or normal WooCommerce additional fields, I can't find the way to remove it.

I have tried the following:

unset( $fields['delegate_1_name'] );
unset( $fields['additional']['delegate_1_name'] );
unset( $fields['billing']['delegate_1_name'] );
unset( $fields['shipping']['delegate_1_name'] );
unset( $fields['company_details_section']['delegate_1_name'] );

This is the conditional function that I am using to unset fields:

function wc_ninja_product_is_in_the_cart() {
    // Add your special product IDs here
    $ids = array( '45', '70', '75' );;

    // Products currently in the cart
    $cart_ids = array();

    // Find each product in the cart and add it to the $cart_ids array
    foreach( WC()->cart->get_cart() as $cart_item_key => $values ) {
        $cart_product = $values['data'];
        $cart_ids[]   = $cart_product->id;
    }

    // If one of the special products are in the cart, return true.
    if ( ! empty( array_intersect( $ids, $cart_ids ) ) ) {
        return true;
    } else {
        return false;
    }
}

This is the functional code to unset normal checkout fields:

function wc_ninja_remove_checkout_field( $fields ) {
    if ( ! wc_ninja_product_is_in_the_cart() ) {
        unset( $fields['billing']['billing_company'] );
    }

    return $fields;
}
add_filter( 'woocommerce_checkout_fields' , 'wc_ninja_remove_checkout_field' );

How to unset custom checkout fields in WooCommerce (not classic ones)?

LoicTheAztec LoicTheAztec · Accepted Answer · 2017-08-26T11:17:43

You can't unset a custom checkout field as it's not set in an array like default classic WooCommerce checkout fields.

So you should use your conditional function directly in your custom field creation code. I have also revisited a bit your existing code:

// Conditional function: If one of the special products is in cart return true, else false
function is_in_cart() {
    // Add your special product IDs here
    $ids = array( 45, 70, 75 );

    foreach( WC()->cart->get_cart() as $cart_item ){
        $product_id = version_compare( WC_VERSION, '3.0', '<' ) ? $cart_item['data']->id : $cart_item['data']->get_id();
        if( in_array( $cart_item['data']->get_id(), $ids ) )
            return true;
    }
    return false;
}

add_filter( 'woocommerce_checkout_fields' , 'remove_checkout_fields', 10, 1 );
function remove_checkout_fields( $fields ) {
    if( ! is_in_cart() )
        unset($fields['billing']['billing_company']);

    return $fields;
}

add_action( 'woocommerce_after_order_notes', 'company_details_section', 10, 1 );
function company_details_section( $checkout ){
    // Here your conditional function
    if( is_in_cart() ){

        echo '<div id="my_custom_checkout_field"><h3>' . __('Company Details') . '</h3>';

        woocommerce_form_field( 'delegate_1_name', array(
            'type' => 'text',
            'class' => array( 'my-field-class form-row-wide delegateExists' ),
            'label' => __('Full name') ,
        ) , $checkout->get_value( 'delegate_1_name' ) );

        echo '</div>';
    }
}

Code goes in function.php file of your active child theme (or theme) or also in any plugin file.

Tested and works for all WooCommerce versions since 2.5.x

Unsetting conditionally custom checkout fields in WooCommerce

1 Answers