我将整个代码复制到this tutorial（第一个代码部分）上，并激活了插件，但是它似乎没有出现在运输方式列表中。我还创建了一个美国地区，在该地区应该可以使用送货方式。
我正在使用WooCommerce 3.6.1和WP 5.1.4。
这是完整的代码。有问题吗？
<?php
/**
* Plugin Name: Cloudways
* Description: Create a woocommerce custom shipping method plugin
*/
if ( ! defined( 'WPINC' ) ){
die('security by preventing any direct access to your plugin file');
}
if (in_array('woocommerce/woocommerce.php', apply_filters('active_plugins', get_option('active_plugins')))) {
function cloudways_shipping_method()
{
if (!class_exists('cloudways_Shipping_Method')) {
class cloudways_Shipping_Method extends WC_Shipping_Method
{
public function __construct()
{
$this->id = 'cloudways';
$this->method_title = __('cloudways Shipping', 'cloudways');
$this->method_description = __('Custom Shipping Method for cloudways', 'cloudways');
// Contreis availability
$this->availability = 'including';
$this->countries = array(
'ES',
'GB',
'US',
);
$this->init();
$this->enabled = isset($this->settings['enabled']) ? $this->settings['enabled'] : 'yes';
$this->title = isset($this->settings['title']) ? $this->settings['title'] : __('cloudways Shipping', 'cloudways');
}
/**
Load the settings API
*/
function init()
{
$this->init_form_fields();
$this->init_settings();
add_action('woocommerce_update_options_shipping_' . $this->id, array($this, 'process_admin_options'));
}
function init_form_fields()
{
$this->form_fields = array(
'enabled' => array(
'title' => __('Enable', 'cloudways'),
'type' => 'checkbox',
'default' => 'yes'
),
'weight' => array(
'title' => __('Weight (kg)', 'cloudways'),
'type' => 'number',
'default' => 50
),
'title' => array(
'title' => __('Title', 'cloudways'),
'type' => 'text',
'default' => __('cloudways Shipping', 'cloudways')
),
);
}
public function cloudways_shipping_calculation($package)
{
$weight = 0;
$cost = 0;
$country = $package["destination"]["country"];
foreach ($package['contents'] as $item_id => $values) {
$_product = $values['data'];
$weight = $weight + $_product->get_weight() * $values['quantity'];
}
$weight = wc_get_weight($weight, 'kg');
if ($weight <= 5) {
$cost = 0;
} elseif ($weight <= 25) {
$cost = 5;
} elseif ($weight <= 45) {
$cost = 10;
} else {
$cost = 15;
}
$countryZones = array(
'ES' => 2,
'GB' => 2,
'US' => 3
);
$zonePrices = array(
2 => 50,
3 => 70
);
$zoneFromCountry = $countryZones[$country];
$priceFromZone = $zonePrices[$zoneFromCountry];
$cost += $priceFromZone;
$rate = array(
'id' => $this->id,
'label' => $this->title,
'cost' => $cost
);
$this->add_rate($rate);
}
}
}
}
add_action('woocommerce_shipping_init', 'cloudways_shipping_method');
function add_cloudways_shipping_method($methods)
{
$methods[] = 'cloudways_Shipping_Method';
return $methods;
}
add_filter('woocommerce_shipping_methods', 'add_cloudways_shipping_method');
function cloudways_validate_order($posted)
{
$packages = WC()->shipping->get_packages();
$chosen_methods = WC()->session->get('chosen_shipping_methods');
if (is_array($chosen_methods) && in_array('cloudways', $chosen_methods)) {
foreach ($packages as $i => $package) {
if ($chosen_methods[$i] != "cloudways") {
continue;
}
$cloudways_Shipping_Method = new cloudways_Shipping_Method();
$weightLimit = (int)$cloudways_Shipping_Method->settings['weight'];
$weight = 0;
foreach ($package['contents'] as $item_id => $values) {
$_product = $values['data'];
$weight = $weight + $_product->get_weight() * $values['quantity'];
}
$weight = wc_get_weight($weight, 'kg');
if ($weight > $weightLimit) {
$message = sprintf(__('OOPS, %d kg increase the maximum weight of %d kg for %s', 'cloudways'), $weight, $weightLimit, $cloudways_Shipping_Method->title);
$messageType = "error";
if (!wc_has_notice($message, $messageType)) {
wc_add_notice($message, $messageType);
}
}
}
}
}
add_action('woocommerce_review_order_before_cart_contents', 'cloudways_validate_order', 10);
add_action('woocommerce_after_checkout_validation', 'cloudways_validate_order', 10);
}
?>