Woocommerce更改结帐页面上的结帐总额

Solved - Here's how. Added a button and a dropdown allowing customers to add the shipping as a product to the cart, here's the code.

add_filter( 'woocommerce_after_order_notes' , 'town_dropdown' );

function town_dropdown($checkout) {
    echo '<div id="town-drop">
    <h2>Delivery Charge</h2>
    <p>We deliver to the villages in the dropdown below. Please choose a village to have the correct price applied to your order. <strong>You must have the correct delivery price added, or your order will not be shipped!</strong></p>';
    echo '<script>
    function AddProductToCart() {
        product = document.getElementById("town_dropdown").value;
        productid = product.split("-");
        window.location = "http://site-url.com/checkout/?add-to-cart="+productid[0];
    }
    </script>';
    woocommerce_form_field( 'town_dropdown', array(
        'type'          => 'select',
        'class'         => array('form-row-wide'),
        'label'         => '',
        'options'     => array(
            '0' => 'Please select a delivery charge',
            '2458-lin' => 'Linton -  £3.50',
            '2468-abi' => 'Gt & Lt Abington - £5.00',
            '2470-bab' => 'Babraham - £6.00', 
            '2468-bal' => 'Balsham - £5.00', 
            '2468-bar' => 'Bartlow - £5.00', 
            '2471-bri' => 'Brinkley - £8.00', 
            '2471-bur' => 'Burrough Green - £8.00', 
            '2471-cam' => 'Cambridge - £8.00', 
            '2468-card' => 'Cardinals Green - £5.00', 
            '2471-carl' => 'Carlton - £8.00', 
            '2470-cas' => 'Castle Camps - £6.00', 
            '2471-che' => 'Cherry Hinton - £8.00',
            '2470-dux' => 'Duxford - £6.00', 
            '2471-ful' => 'Fulbourn - £8.00', 
            '2468-had' => 'Hadstock - £5.00', 
            '2471-hav' => 'Haverhill - £8.00', 
            '2471-hel' => 'Helions Bumpstead - £8.00', 
            '2471-hem' => 'Hempstead - £8.00', 
            '2468-hil' => 'Hildersham - £5.00', 
            '2471-hix' => 'Hinxton - £8.00', 
            '2468-hor' => 'Horseheath - £5.00', 
            '2471-ick' => 'Ickleton - £8.00', 
            '2471-ked' => 'Kedington - £8.00', 
            '2471-litb' => 'Littlebury - £8.00', 
            '2470-litw' => 'Little Walden - £6.00', 
            '2470-rad' => 'Radwinter - £6.00', 
            '2471-saf' => 'Saffron Walden - £8.00', 
            '2471-sam' => 'Gt &amp; Lt Sampford - £8.00', 
            '2470-saw' => 'Sawston - £6.00', 
            '2471-sew' => 'Sewards End - £8.00', 
            '2471-she' => 'Shelfords - £8.00', 
            '2471-ste' => 'Steeple Bumpstead - £8.00', 
            '2470-str' => 'Streetly End - £6.00', 
            '2471-thu' => 'Thurlow - £8.00', 
            '2470-wwi' => 'West Wickham - £6.00', 
            '2470-wwa' => 'West Wratting - £6.00', 
            '2470-wco' => 'Weston Colville - £6.00', 
            '2471-wgr' => 'Weston Green - £8.00', 
            '2471-whi' => 'Whittlesford - £8.00', 
            '2471-wil' => 'Gt &amp; Lt Wilbraham - £8.00', 
            '2470-wit' => 'Withersfield - £6.00', 
            '2471-wra' => 'Gt &amp; Lt Wratting - £8.00', 
            )
        ),$checkout->get_value('town_dropdown')
    );
    echo '<button type="button" OnClick="AddProductToCart()">Add Shipping</button>';
    echo '</div>';
}

单击按钮后，Javascript重定向到将选择值的第一部分用作产品ID的产品添加到购物车的页面（之所以需要这样做，是因为PHP数组不能具有相同的多个元素标识符）。希望这对某人有帮助-如果有q，请用q进行评论。