添加自定义的支付网关与Woocommerce额外的单选按钮(Add a custom payment

我开发woocommerce follogin一个自定义的付款方式是我的代码：

class WC_Gateway_Custom extends WC_Payment_Gateway {

    public $domain;

    /**
     * Constructor for the gateway.
     */
    public function __construct() {

        $this->domain = 'custom_payment';

        $this->id                 = 'custom';
        $this->icon               = apply_filters('woocommerce_custom_gateway_icon', '');
        $this->has_fields         = false;
        $this->method_title       = __( 'Custom', $this->domain );
        $this->method_description = __( 'Allows payments with custom gateway.', $this->domain );

        // Load the settings.
        $this->init_form_fields();
        $this->init_settings();

        // Define user set variables
        $this->title        = $this->get_option( 'title' );
        $this->description  = $this->get_option( 'description' );
        $this->instructions = $this->get_option( 'instructions', $this->description );
        $this->order_status = $this->get_option( 'order_status', 'completed' );

        // Actions
        add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
        add_action( 'woocommerce_thankyou_custom', array( $this, 'thankyou_page' ) );

        // Customer Emails
        add_action( 'woocommerce_email_before_order_table', array( $this, 'email_instructions' ), 10, 3 );
    }

    /**
     * Initialise Gateway Settings Form Fields.
     */
    public function init_form_fields() {

        $this->form_fields = array(
            'enabled' => array(
                'title'   => __( 'Enable/Disable', $this->domain ),
                'type'    => 'checkbox',
                'label'   => __( 'Enable Custom Payment', $this->domain ),
                'default' => 'yes'
            ),
            'title' => array(
                'title'       => __( 'Title', $this->domain ),
                'type'        => 'text',
                'description' => __( 'This controls the title which the user sees during checkout.', $this->domain ),
                'default'     => __( 'Custom Payment', $this->domain ),
                'desc_tip'    => true,
            ),
            'order_status' => array(
                'title'       => __( 'Order Status', $this->domain ),
                'type'        => 'select',
                'class'       => 'wc-enhanced-select',
                'description' => __( 'Choose whether status you wish after checkout.', $this->domain ),
                'default'     => 'wc-completed',
                'desc_tip'    => true,
                'options'     => wc_get_order_statuses()
            ),
            'description' => array(
                'title'       => __( 'Description', $this->domain ),
                'type'        => 'textarea',
                'description' => __( 'Payment method description that the customer will see on your checkout.', $this->domain ),
                'default'     => __('Payment Information', $this->domain),
                'desc_tip'    => true,
            ),
            'instructions' => array(
                'title'       => __( 'Instructions', $this->domain ),
                'type'        => 'textarea',
                'description' => __( 'Instructions that will be added to the thank you page and emails.', $this->domain ),
                'default'     => '',
                'desc_tip'    => true,
            ),
        );
    }

    /**
     * Output for the order received page.
     */
    public function thankyou_page() {
        if ( $this->instructions )
            echo wpautop( wptexturize( $this->instructions ) );
    }

    /**
     * Add content to the WC emails.
     *
     * @access public
     * @param WC_Order $order
     * @param bool $sent_to_admin
     * @param bool $plain_text
     */        

    public function payment_fields(){

        if ( $description = $this->get_description() ) {
            echo wpautop( wptexturize( $description ) );
        }
        echo 'added custom field in radio buttons';
     /**
     * Process the payment and return the result.
     *
     * @param int $order_id
     * @return array
     */
    }
    public function generate_form($order_id){
        global $woocommerce;

    // Get this Order's information so that we know
    // who to charge and how much
    $customer_order = new WC_Order($order_id);

    $_instructions     = $this->instructions;
    $_order_status    = $this->order_status;


    $items = $customer_order->get_items();
    $product_name  = array();
    foreach ( $items as $item ) {
        array_push($product_name, $item['name']);
    }
    $_Description   = implode(", ", $product_name);
    echo 'here i want to get the value selected by the customer from front end';
    //here is the part where i want to get the value of form inside payment_fields() fucntion 
    exit;   
    } 

}

我需要设置我的自定义付款方式安装的屏幕截图，以及为更好地了解交易类型，请参阅：

有关于如何通过驾驭这一payment_fields（）函数，我可以得到的HTML打印，但没有任何想法如何获取值并将其设置为交易类型的顺序没有帮助

有一些失误，错误和遗漏的东西在你的代码...这里是当它在结帐页面的选择的作品加入到这个“特殊”无线支付网关上的按钮，一个完整的插件文件。

所选择的“交易类型”单选按钮的值将被保存在顺序为自定义的元数据。

所选择的“交易类型”值将显示在：

为了收到页面，我的帐户>查看订单
联系编辑订单页面
在电子邮件通知

在顺序查看页面：

下面是完整的插件代码：

<?php
/**
 * Plugin Name: WooCommerce Special Payment Gateway
 * Plugin URI:
 * Description: custom Special payment method.
 * Author: Me
 * Author URI: http://www.something.tld/
 * Version: 1.1.0
 * Text Domain: wcpg-special
 * Domain Path: /i18n/languages/
 *
 * Copyright: (c) 2018
 *
 * License: GNU General Public License v3.0
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 *
 * @package   wcpg-special
 * @author    Me
 * @category  Admin
 * @copyright Copyright (c)  2016-2018
 * @license   http://www.gnu.org/licenses/gpl-3.0.html GNU General Public License v3.0
 */
defined( 'ABSPATH' ) or exit;
// Make sure WooCommerce is active
if ( ! in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {
    return;
}
/**
 * Add the gateway to WC Available Gateways
 *
 * @since 1.0.0
 * @param array $gateways all available WC gateways
 * @return array $gateways all WC gateways + Custom Special gateway
 */
function wc_add_special_to_gateways( $gateways ) {
    $gateways[] = 'WC_Gateway_Special';
    return $gateways;
}
add_filter( 'woocommerce_payment_gateways', 'wc_add_special_to_gateways' );
/**
 * Adds plugin page links
 *
 * @since 1.0.0
 * @param array $links all plugin links
 * @return array $links all plugin links + our custom links (i.e., "Settings")
 */
function wc_special_gateway_plugin_links( $links ) {
    $plugin_links = array(
        '<a href="' . admin_url( 'admin.php?page=wc-settings&tab=checkout&section=special_payment' ) . '">' . __( 'Configure', 'wcpg-special' ) . '</a>'
    );
    return array_merge( $plugin_links, $links );
}
add_filter( 'plugin_action_links_' . plugin_basename( __FILE__ ), 'wc_special_gateway_plugin_links' );
/**
 * Custom Payment Gateway
 *
 * Provides an Custom Payment Gateway; mainly for testing purposes.
 * We load it later to ensure WC is loaded first since we're extending it.
 *
 * @class       WC_Gateway_Special
 * @extends     WC_Payment_Gateway
 * @version     1.0.0
 * @package     WooCommerce/Classes/Payment
 * @author      Me
 */
add_action( 'plugins_loaded', 'wc_special_gateway_init', 11 );
function wc_special_gateway_init() {
    class WC_Gateway_Special extends WC_Payment_Gateway {

        public $domain;

        /**
         * Constructor for the gateway.
         */
        public function __construct() {
            $this->id                 = 'special_payment';
            $this->domain             = 'wcpg-special';
            $this->icon               = apply_filters('woocommerce_payment_gateway_icon', '');
            $this->has_fields         = false;
            $this->method_title       = __( 'Custom Payment', $this->domain );

            // Define "payment type" radio buttons options field
            $this->options = array(
                'type1' => __( 'Type 1', $this->domain ),
                'type2' => __( 'Type 2', $this->domain ),
                'type3' => __( 'Type 3', $this->domain ),
            );

            // Load the settings.
            $this->init_form_fields();
            $this->init_settings();

            // Define user set variables
            $this->title        = $this->get_option( 'title' );
            $this->description  = $this->get_option( 'description' );
            $this->instructions = $this->get_option( 'instructions' );
            $this->order_status = $this->get_option( 'order_status' );
            $this->status_text  = $this->get_option( 'status_text' );

            // Actions
            add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
            add_action( 'woocommerce_checkout_create_order', array( $this, 'save_order_payment_type_meta_data' ), 10, 2 );
            add_filter( 'woocommerce_get_order_item_totals', array( $this, 'display_transaction_type_order_item_totals'), 10, 3 );
            add_action( 'woocommerce_admin_order_data_after_billing_address',  array( $this, 'display_payment_type_order_edit_pages'), 10, 1 );
            add_action( 'woocommerce_thankyou_' . $this->id, array( $this, 'thankyou_page' ) );

            // Customer Emails
            add_action( 'woocommerce_email_before_order_table', array( $this, 'email_instructions' ), 10, 3 );
        }
        /**
         * Initialize Gateway Settings Form Fields
         */
        public function init_form_fields() {
            $this->form_fields = apply_filters( 'wc_special_payment_form_fields', array(
                'enabled' => array(
                    'title'   => __( 'Enable/Disable', $this->domain ),
                    'type'    => 'checkbox',
                    'label'   => __( 'Enable Special Payment', $this->domain ),
                    'default' => 'yes'
                ),
                'title' => array(
                    'title'       => __( 'Title', $this->domain ),
                    'type'        => 'text',
                    'description' => __( 'This controls the title for the payment method the customer sees during checkout.', $this->domain ),
                    'default'     => __( 'Special Payment', $this->domain ),
                    'desc_tip'    => true,
                ),
                'description' => array(
                    'title'       => __( 'Description', $this->domain ),
                    'type'        => 'textarea',
                    'description' => __( 'Payment method description that the customer will see on your checkout.', $this->domain ),
                    'default'     => __( 'Please remit payment to Store Name upon pickup or delivery.', $this->domain ),
                    'desc_tip'    => true,
                ),
                'instructions' => array(
                    'title'       => __( 'Instructions', $this->domain ),
                    'type'        => 'textarea',
                    'description' => __( 'Instructions that will be added to the thank you page and emails.', $this->domain ),
                    'default'     => '', // Empty by default
                    'desc_tip'    => true,
                ),
                'order_status' => array(
                    'title'       => __( 'Order Status', $this->domain ),
                    'type'        => 'select',
                    'description' => __( 'Choose whether order status you wish after checkout.', $this->domain ),
                    'default'     => 'wc-completed',
                    'desc_tip'    => true,
                    'class'       => 'wc-enhanced-select',
                    'options'     => wc_get_order_statuses()
                ),
                'status_text' => array(
                    'title'       => __( 'Order Status Text', $this->domain ),
                    'type'        => 'text',
                    'description' => __( 'Set the text for the selected order status.', $this->domain ),
                    'default'     => __( 'Order is completed', $this->domain ),
                    'desc_tip'    => true,
                ),
            ) );
        }

        /**
         * Output the "payment type" radio buttons fields in checkout.
         */
        public function payment_fields(){
            if ( $description = $this->get_description() ) {
                echo wpautop( wptexturize( $description ) );
            }

            echo '<style>#transaction_type_field label.radio { display:inline-block; margin:0 .8em 0 .4em}</style>';

            $option_keys = array_keys($this->options);

            woocommerce_form_field( 'transaction_type', array(
                'type'          => 'radio',
                'class'         => array('transaction_type form-row-wide'),
                'label'         => __('Payment Information', $this->domain),
                'options'       => $this->options,
            ), reset( $option_keys ) );
        }

        /**
         * Save the chosen payment type as order meta data.
         *
         * @param object $order
         * @param array $data
         */
        public function save_order_payment_type_meta_data( $order, $data ) {
            if ( $data['payment_method'] === $this->id && isset($_POST['transaction_type']) )
                $order->update_meta_data('_transaction_type', esc_attr($_POST['transaction_type']) );
        }

        /**
         * Output for the order received page.
         *
         * @param int $order_id
         */
        public function thankyou_page( $order_id ) {
            $order = wc_get_order( $order_id );

            if ( $this->instructions ) {
                echo wpautop( wptexturize( $this->instructions ) );
            }
        }

        /**
         * Display the chosen payment type on the order edit pages (backend)
         *
         * @param object $order
         */
        public function display_payment_type_order_edit_pages( $order ){
            if( $this->id === $order->get_payment_method() && $order->get_meta('_transaction_type') ) {
                $options  = $this->options;
                echo '<p><strong>'.__('Transaction type').':</strong> ' . $options[$order->get_meta('_transaction_type')] . '</p>';
            }
        }

        /**
         * Display the chosen payment type on order totals table
         *
         * @param array    $total_rows
         * @param WC_Order $order
         * @param bool     $tax_display
         * @return array
         */
        public function display_transaction_type_order_item_totals( $total_rows, $order, $tax_display ){
            if( is_a( $order, 'WC_Order' ) && $order->get_meta('_transaction_type') ) {
                $new_rows = []; // Initializing
                $options  = $this->options;

                // Loop through order total lines
                foreach( $total_rows as $total_key => $total_values ) {
                    $new_rows[$total_key] = $total_values;
                    if( $total_key === 'payment_method' ) {
                        $new_rows['payment_type'] = [
                            'label' => __("Transaction type", $this->domain) . ':',
                            'value' => $options[$order->get_meta('_transaction_type')],
                        ];
                    }
                }

                $total_rows = $new_rows;
            }
            return $total_rows;
        }

        /**
         * Add content to the WC emails.
         *
         * @access public
         * @param WC_Order $order
         * @param bool $sent_to_admin
         * @param bool $plain_text
         */
        public function email_instructions( $order, $sent_to_admin, $plain_text = false ) {
            if ( $this->instructions && ! $sent_to_admin && $this->id === $order->get_payment_method()
            && $order->has_status( $this->order_status ) ) {
                echo wpautop( wptexturize( $this->instructions ) ) . PHP_EOL;
            }
        }

        /**
         * Process the payment and return the result
         *
         * @param int $order_id
         * @return array
         */
        public function process_payment( $order_id ) {
            $order = wc_get_order( $order_id );

            // Mark as on-hold (we're awaiting the payment)
            $order->update_status( $this->order_status, $this->status_text );

            // Reduce stock levels
            wc_reduce_stock_levels( $order->get_id() );

            // Remove cart
            WC()->cart->empty_cart();

            // Return thankyou redirect
            return array(
                'result'    => 'success',
                'redirect'  => $this->get_return_url( $order )
            );
        }
    }
}

代码放在您的活动子主题的function.php文件（或活动主题）。测试和工程。

在电子邮件通知：