Woocommerce - Adding Custom Fee Together in Cart - function

Question

I created a function for a custom field for a fee which also multiplies depending on the amount of people booking:
// Add Custom Field to Product under General
function create_extra_fee_field() {
$args = array(
'id' => 'park_fee',
'label' => __( 'Natl Park Entrance Fee', 'tranq-lsx-child' ),
'class' => 'tranq-custom-field',
'desc_tip' => true,
'description' => __( 'This sets the Fee that will be added to the car.', 'tranq-lsx-child' ),
);
woocommerce_wp_text_input( $args );
}
add_action( 'woocommerce_product_options_general_product_data', 'create_extra_fee_field' );
// Save Custom Field Data
function save_extra_fee_field( $post_id ) {
$product = wc_get_product( $post_id );
$title = isset( $_POST['park_fee'] ) ? $_POST['park_fee'] : '';
$product->update_meta_data( 'park_fee', sanitize_text_field( $title ) );
$product->save();
}
add_action( 'woocommerce_process_product_meta', 'save_extra_fee_field' );
// Add Custom Field to Cart Totals
function woo_add_cart_fee() {
global $woocommerce;
foreach( WC()->cart->get_cart() as $cart_items ){
// Get the WC_Product object (instance)
$product = $cart_items['data'];
$product_id = $product->get_id(); // get the product ID
$custom_field_value = get_post_meta( $product->get_id(), 'park_fee', true );
$person = array_sum( $cart_items['booking']['_persons'] );
}
$additional_fee_name = "Natl Park Entrance Fee";
$extra_fee = $custom_field_value * $person;
$addedFee = false;
// first check to make sure it isn’t already there
foreach ( $woocommerce->cart->get_fees() as $_fee )
{
if ($_fee->id == sanitize_title($additional_fee_name) )
{
$_fee->amount = (float) esc_attr( $extra_fee );
}
}
if (!$addedFee)
{
$woocommerce->cart->add_fee( __($additional_fee_name, "woocommerce"),
$extra_fee, $additional_fee_taxable );
}
}
add_action( "woocommerce_before_calculate_totals", "woo_add_cart_fee" );
The one product is making use of that custom fee while the other product isn't its set to 0
But when both are added to the cart the fee just shows 0.
Is there any way to add both park fees together?

Answer 1

#Demonix, it is because the $custom_field_value is being overwritten with a '0' value, as the function loops through the attached products.
If you add in a statement to check if the park_fee is an actual number before replacing $custom_field_value
function woo_add_cart_fee() {
global $woocommerce;
$custom_field_value = 0;
foreach( WC()->cart->get_cart() as $cart_item ) {
// Get the WC_Product object (instance)
$product = $cart_item['data'];
$product_id = $product->get_id(); // get the product ID
$temp_value = get_post_meta( $product->get_id(), 'park_fee', true );
if ( false !== $temp_value && 0 !== $temp_value && '' !== $temp_value && '0' !== $temp_value ) {
$custom_field_value = $temp_value;
}
$person = array_sum( $cart_item['booking']['_persons'] );
}
$additional_fee_name = "Natl Park Entrance Fee";
$extra_fee = $custom_field_value * $person;
$addedFee = false;
// first check to make sure it isn’t already there
foreach ( $woocommerce->cart->get_fees() as $_fee ) {
if ($_fee->id == sanitize_title($additional_fee_name) ) {
$_fee->amount = (float) esc_attr( $extra_fee );
}
}
if (!$addedFee) {
$woocommerce->cart->add_fee( __($additional_fee_name, "woocommerce"),
$extra_fee, $additional_fee_taxable );
}
}
add_action( "woocommerce_before_calculate_totals", "woo_add_cart_fee" );