Issue display shipping data on WooCommerce single product page

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As an attempt in being extra informative, using the latest WC and WP, I get two notices when displaying shipping data on the WooCommerce product page.

Notice: Undefined index: min_amount on line 89 and 91

I have the code in my theme's functions.php file and it worked fine until I started debugging everything (wp-config).

The errors refers to these two lines:

$cost = $instance['cost'] ? $instance['cost'] : $instance['min_amount'];
$above = $instance['min_amount'] ? 'above ' : '';

Can anyone please shed some insight as to where I am going wrong / what I am doing wrong here?

This is my code in full:

add_action( 'woocommerce_after_add_to_cart_form', 'shipping_on_product_page' );
function shipping_on_product_page() {

    // get all zones
    $zones = WC_Shipping_Zones::get_zones();

    // get the shop base country
    $base_country = WC()->countries->get_base_country();
    $base_city = WC()->countries->get_base_city();

    // start display of table
    echo '<div>' . __( 'Available Shipping', 'woocommerce' );
    echo '<br><small><span class="shipping-time-cutoff">All orders are shipped from the '.$base_country.'. Order before 12AM Mon-Fri for same day delivery within '.$base_city.'. Order before 3PM Mon-Thu for next day delivery.</span></small>';
    echo '<small><table class="shipping-and-delivery-table">';

    // get name of each zone and each shipping method for each zone
    foreach ( $zones as $zone_id => $zone ) {
        
        echo '<tr><td>';
       
        echo '<strong>' . $zone['zone_name'] . '</strong>' . '</td><td>';

        $zone_shipping_methods = $zone['shipping_methods'];
    
    foreach ( $zone_shipping_methods as $index => $method ) {

        $instance = $method->instance_settings;
        $cost = $instance['cost'] ? $instance['cost'] : $instance['min_amount'];
        $above = $instance['min_amount'] ? 'above ' : '';
        echo $instance['title'] . ': ' . $above . '<strong>' . wc_price( $cost ) . '</strong>' . '<br>';
    
    }

        echo '</td></tr>';
    }
        echo '</table></small></div>';
}
shipping woocommerce wordpress php
1 Answers

Check if the values ​​are actually set, because that is not always the case for each shipping method.

So you get:

function action_woocommerce_after_add_to_cart_form() {
    // get all zones
    $zones = WC_Shipping_Zones::get_zones();

    // get the shop base country
    $base_country = WC()->countries->get_base_country();
    $base_city = WC()->countries->get_base_city();

    // start display of table
    echo '<div>' . __( 'Available Shipping', 'woocommerce' );
    echo '<br><small><span class="shipping-time-cutoff">All orders are shipped from the '.$base_country.'. Order before 12AM Mon-Fri for same day delivery within '.$base_city.'. Order before 3PM Mon-Thu for next day delivery.</span></small>';
    echo '<small><table class="shipping-and-delivery-table">';

    // get name of each zone and each shipping method for each zone
    foreach ( $zones as $zone_id => $zone ) {
        
        echo '<tr><td>';
       
        echo '<strong>' . $zone['zone_name'] . '</strong>' . '</td><td>';

        $zone_shipping_methods = $zone['shipping_methods'];
    
        foreach ( $zone_shipping_methods as $index => $method ) {
            $instance = $method->instance_settings;
                        
            if ( isset( $instance['min_amount'] ) ) {
                $instance_min_amount = $instance['min_amount'];
            } else {
                $instance_min_amount = 0;
            }

            if ( isset( $instance['cost'] ) ) {
                $instance_cost = $instance['cost'];
            } else {
                $instance_cost = 0;
            }           
            
            $cost = $instance_cost ? $instance_cost : $instance_min_amount;
            $above = $instance_min_amount ? 'above ' : '';
            
            echo $instance['title'] . ': ' . $above . '<strong>' . wc_price( $cost ) . '</strong>' . '<br>';        
        }

        echo '</td></tr>';
    }
        
    echo '</table></small></div>';
}
add_action( 'woocommerce_after_add_to_cart_form', 'action_woocommerce_after_add_to_cart_form', 10, 0 );

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