Php 在WooCommerce 3.3中使用Google Map API进行校验距离计算

我发了帖子，我在那里得到了帮助来解决这个问题。在Woocommerce版本3.1.2之前，它一直运行良好。我一直在更新WooCommerce的最新版本，希望问题能够得到解决

我根据结帐时客户的账单区域自定义下拉列表和用户配置文件中设置的卖家账单城市值之间的差异添加动态费用。我使用的代码如下所示-

这是一个jQuery脚本，运行该脚本可获取更改后的计费区域值：

add_action( 'woocommerce_after_checkout_form', 'custom_checkout_jquery_script', 10 );
function custom_checkout_jquery_script() {
    ?>
    <script type="text/javascript">
        (function($){
            $( 'form.checkout' ).on( 'change', '#billing_area', function(){
                var location = $('#billing_area option:selected').val();
                document.cookie="cusarea="+location;

                // Browser console output (Just for testing)
                function readCookie(n){ for(var r=n+"=",t=document.cookie.split(";"),e=0;e<t.length;e++){
                    for(var i=t[e];" "==i.charAt(0);)i=i.substring(1,i.length);
                    if(0==i.indexOf(r))return i.substring(r.length,i.length)}return null}
                $('body').trigger('update_checkout');
                console.log('Selected Area: '+location+' | Cookie: '+readCookie("cusarea"));

                //$('#order_review').load(document.URL +  ' #order_review');
                //window.location.reload(true)
            });
        })(jQuery);
        </script>
    <?php
}

这是计算费用的代码：

add_action( 'woocommerce_cart_calculate_fees', 'distance_shipping_fee', 30, 1 );
function distance_shipping_fee( $wc_cart ){

    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;

    if( empty($_COOKIE ['cusarea']) ) return;
    else $cookie = $_COOKIE ['cusarea'];

    // Encoding the customer's location for Google API
    $customer_area = rawurlencode( $cookie );

    // Getting billing city of vendors
    foreach( $wc_cart->get_cart() as $cart_item ){
        $vendor_id = get_post_field( 'post_author', $cart_item['product_id'] );
        $vendors[$vendor_id] = get_user_meta($vendor_id, 'billing_city', true);
    }

    foreach( $vendors as $vend_loc){

        // Setting Google API URL ##
        $gapi_key = MY_APY; // Set HERE your google api key
        $shippingurl = "https://maps.googleapis.com/maps/api/distancematrix/json?origins=$vend_loc";
        $shippingurl .= "+dhaka+bangladesh&destinations=$customer_area+dhaka+bangladesh&key=$gapi_key";

        // Now fetching json response from googleapis:
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $shippingurl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $response = json_decode(curl_exec($ch), true);

        // If google responds with a status of OK: Extract the distance text:
        if($response['status'] == "OK")
            $dist = $response['rows'][0]['elements'][0]['distance']['text'];

        $dist_array[] = preg_replace("/[^0-9\.]/", '', $dist);
    }


    // Get the bigger distance
    $dist_ance = max($dist_array);
    $dist_abs = abs ($dist_ance);

    if ( $dist_abs < 5) {        
        $wc_cart->add_fee( "Delivery - Distance Rate", 10 , true);
        } else {
        $wc_cart->add_fee( "Delivery - Distance Rate", 20 , true);
     }
}

问题是-它不再工作了

如果我转储该值，它将返回$dist_abs的值，类似于5.4，这是卖家位置和客户区域之间的距离。但是，不向购物车添加任何费用

有时，当服务器或站点运行缓慢时，我会在order review中看到标签交付距离率，但一旦页面加载正确，它就会消失

---

有人能告诉我为什么它不工作了吗？有什么我遗漏的吗？

我已经找到了使用ajax而不是cookies使其工作的方法……因此请尝试以下方法：

add_action( 'woocommerce_after_checkout_form', 'custom_checkout_jquery_script', 30 );
function custom_checkout_jquery_script() {
    if( ! is_checkout() ) return;
    ?>
    <script type="text/javascript">
    jQuery(function($){
        // wc_checkout_params is required to continue
        if ( typeof wc_checkout_params === 'undefined' )
            return false;

        var a = '#billing_myfield5', b = a+' option:selected';
        $( 'form.checkout' ).on( 'change', a, function(){
            console.log('Chosen area: '+$(b).html()); // To be removed (testing)

            // Ajax: send the chosen customer location to php
            $.ajax({
                type: 'POST',
                url:.ajax_url,
                data: {
                    'action': 'set_customer_area',
                    'customer_area': $(b).html(),
                },
                success: function (response) {
                    $(document.body).trigger('update_checkout');
                    console.log('Response: '+response); // To be removed (testing)
                }
            });
        });
    });
    </script>
    <?php
}

// Wordpress Ajax: Saved the selected customer location to WC_Session
add_action( 'wp_ajax_nopriv_set_customer_area', 'set_customer_area_in_wc_sessions' );
add_action( 'wp_ajax_set_customer_area', 'set_customer_area_in_wc_sessions' );
function set_customer_area_in_wc_sessions() {
    if( ! isset($_POST['customer_area']) ) return;

    // Encoding the customer's location for Google API
    $customer_area_enc = rawurlencode( $_POST['customer_area'] );

    // Set the chosen customer location in WC_Sessions
    WC()->session->set('customer_area', rawurlencode($_POST['customer_area']) );

    // To be removed (testing: Send back the data to jQuery)
    echo json_encode( WC()->session->get('customer_area' ) );

    die(); // To avoid server error 500
}

// Add a fee based on the highest distance between customer and vendors
add_action( 'woocommerce_cart_calculate_fees', 'distance_shipping_fee', 30, 1 );
function distance_shipping_fee( $cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // Get Url encoded customer area that is saved in WC_Session by ajax
    $customer_area = WC()->session->get('customer_area' );

    // Only when customer area has been selected
    if( empty($customer_area) )
        return;

    // Getting billing city of vendors
    foreach( $cart->get_cart() as $cart_item ){
        $vendor_id = get_post_field( 'post_author', $cart_item['product_id'] );
        $vendors[$vendor_id] = get_user_meta($vendor_id, 'billing_city', true);
    }
    $dist_array = array();

    // Loop through vendors locations
    foreach( $vendors as $vend_loc){

        // Setting Google API URL ##
        $gapi_key = MY_APY; // Set HERE your google api key
        $shippingurl = "https://maps.googleapis.com/maps/api/distancematrix/json?origins=$vend_loc";
        $shippingurl .= "+dhaka+bangladesh&destinations=$customer_area+dhaka+bangladesh&key=$gapi_key";

        // Now fetching json response from googleapis:
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $shippingurl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $response = json_decode(curl_exec($ch), true);

        // If google responds with a status of OK: Extract the distance text:
        if($response['status'] == "OK")
            $dist = $response['rows'][0]['elements'][0]['distance']['text'];

        $dist_array[] = preg_replace("/[^0-9\.]/", '', $dist);
    }

    // Get the bigger distance
    $distance = max ($dist_array);
    $distance = abs ($distance);

    $fee = $distance < 5 ? 10 : 20;

    if ( $distance && $fee > 0 )
        $cart->add_fee( "Delivery - Distance Rate", $fee , true);
}

代码进入活动子主题或活动主题的function.php文件。测试和工作

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一旦开始工作，您将不得不使用//Testing==>删除所有相关行，以便删除

非常感谢您的贡献。不幸的是，它不能正常工作。如果我从下拉列表中选择一个区域，则不会发生任何更改。然后，如果我选择另一个区域，结帐表单将冻结。我也尝试过删除这些行，但到目前为止没有任何变化。@Hasan我应该在你自己的网站或舞台网站上测试一下……对我来说，它是有效的……但我不使用zap和google api模拟数据。所以请通过我的个人资料联系表与我联系。谢谢。我已经用表格联系过了。