我正在使用一个自定义XML-RPC方法来捕获我正在构建的插件的一些信息。激活后，用户必须通过输入在我的WP网站上购买插件时提供给他们的用户/密码来验证自己。

插件使用以下代码：

if ( isset( $_POST[\'username\'] ) && isset( $_POST[\'password\'] ) ) {

        /* check against remote server */
        require_once( ABSPATH . WPINC . \'/class-IXR.php\' );
        $this->client = new IXR_Client( trailingslashit( CUSTOMLOGIN_UPDATE_API ) . \'xmlrpc.php\' ); //*/

        $url = ( ( is_multisite() ) ? network_site_url() : site_url() );

        $client_request_args = array(
            \'username\'  => $_POST[\'username\'],
            \'password\'  => $_POST[\'password\'],
            \'plugin\'    => CUSTOMLOGINPRO_BASENAME,
            \'url\'       => $url
        );

        if ( !$this->client->query( \'thefrosty.is_user_authorized\', $client_request_args ) ) {
            add_action( \'admin_notices\', array( $this, \'error_notice\' ) );
            return false;
        }

        $this->settings = get_option( CUSTOMLOGINPRO . \'_settings\', array() );
        $this->settings[\'api-key\'] = $this->client->getResponse();
        update_option( CUSTOMLOGINPRO . \'_settings\', $this->settings );
        header( \'Location: \' . admin_url( \'options-general.php?page=\' . CUSTOMLOGINPRO ) );
        die();

    } 

我一直坚持的是后端代码。我在WP安装的核心插件中创建了一个类。我想这就是它需要的地方。我缺少一些故障代码和错误消息响应，不知道如何执行这些操作。只是想在正确的方向上推动一下。。

正如您所见，我也在针对WooCommerce订单测试用户（WC的代码应该很好），但是尝试更新订单元数据可能需要修复以保存用户URL。

class frosty_core {

function __construct() {
    add_filter( \'xmlrpc_methods\', array( $this, \'xmlrpc_methods\' ) );
}

/**
 * Create our custom XML-rpc method.
 * @ref http://kovshenin.com/2010/04/custom-xml-rpc-methods-in-wordpress-2151/
 */
function xmlrpc_methods( $methods ) {
    $methods[\'thefrosty.is_user_authorized\'] = array( $this, \'thefrosty_plugin_callback\' );
    return $methods;
}

/**
 * XML-prc mothod
 */
function thefrosty_plugin_callback( $args ) {

    // Parse the arguments, assuming they\'re in the correct order
    $username       = $args[0];
    $password       = $args[1];
    $plugin_name    = $args[2];
    $url            = $args[3];

    global $wp_xmlrpc_server;

    // Let\'s run a check to see if credentials are okay
    if ( !$user = $wp_xmlrpc_server->login($username, $password) ) {
        return $wp_xmlrpc_server->error;
    }

    if ( !class_exists( \'woocommerce\' ) ) return \'error, please try again later\';

    /* Get the user ID by name */
    $current_user_id = get_userdatabylogin( $username );

    /* woocommerce/shortcodes/shortcode-my_account.php */
    $args = array(
        \'numberposts\'     => -1,
        \'meta_key\'        => \'_customer_user\',
        \'meta_value\'      => $current_user_id,
        \'post_type\'       => \'shop_order\',
        \'post_status\'     => \'publish\' 
    );
    $customer_orders = get_posts( $args );      
    $match = false;

    foreach ( $customer_orders as $customer_order ) :
        $order = &new woocommerce_order();
        $order->populate( $customer_order );

        $status = get_term_by( \'slug\', $order->status, \'shop_order_status\' );
        if ( \'completed\' !== $status->name ) return; //error, order not completed //*/

        if ( $plugin_name !== $order->items->name ) return; // you have not purchased this plugin //*/

        $match  = true;
        $apikey = $order->order_key;
    endforeach;

    if ( isset( $match ) && $match ) {
        /* woocommerce/admin/writepanels/writepanel-order_data.php */
        add_filter( \'update_order_item\', create_function( \'$order_items\', \'
            $new_meta   = &new order_item_meta();
            $meta_name  = "active_urls";
            $meta_value = esc_url( $url );

            $new_meta->add( $meta_name, $meta_value );
            return $order_items["item_meta"] => $new_meta->meta;\' ) );

        return $apikey;
    }
    else return false;
}