Woocommerce 调用网址（完成订单后）

我有 3 个问题（需要帮助）：

1. 我不知道，如何运行这个插件（给我致命错误）请检查我的脚本（我是初学者）
2. 需要管理页面帮助来设置 APIkey 并选择调用 URL 的语言http://xxx.CZ or http://xxx.SK（此页面尚未编写脚本）
3. 如何将我的插件管理页面添加到 woocommerce 管理页面？

该插件适用于 Woocommerce。它应该调用特定的URL(http://heureka.cz/or .sk/dotaznik/"Clients API set up in admin page in woocommerce"/"Customers email"/"Order ID"/"bought Products ID"/)当客户订单完成时。

我是 PHP 和 Wordpress 的初学者。谢谢大家对我的帮助。

CODE:

<?php
/*
Plugin Name: Overené zákazníkmi Heureka
Plugin URI: http://www.podujatie.eu
Version: 0.1
Description: 
Author: Podujatie.eu, Ing. Igor Kóňa
Tested up to: 3.6
Author URI: http://www.podujatie.eu
Text Domain: woocommerce-new-badge
License: GNU General Public License v3.0
License URI: http://www.gnu.org/licenses/gpl-3.0.html
*/
/**
 * Check if WooCommerce is active
 **/
if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {

    if ( ! class_exists( 'WC_HO' ) ) {

        class WC_HO {

        function heurekaovereno( $order_id ) {     
        error_log( "Order complete for order $order_id", 0 ); } 
        add_action( 'woocommerce_order_status_completed', 'heurekaovereno' );

    // order object (optional but handy)
    $order = new WC_Order( $order_id );

    // do some stuff here
        private function sendRequest($url)
        {
        $parsed = parse_url($url);
        $fp = fsockopen($parsed['host'], 80, $errno, $errstr, 5);
        if (!$fp) {
            throw new HeurekaOverenoException($errstr . ' (' . $errno . ')');
            } else {
            $return = '';
            $out = "GET " . $parsed['path'] . "?" . $parsed['query'] . " HTTP/1.1\r\n" .
                    "Host: " . $parsed['host'] . "\r\n" .
                    "Connection: Close\r\n\r\n";
            fputs($fp, $out);
            while (!feof($fp)) {
                $return .= fgets($fp, 128);
            }
            fclose($fp);
            $returnParsed = explode("\r\n\r\n", $return);

            return empty($returnParsed[1]) ? '' : trim($returnParsed[1]);
            }
        }
        /**
     * Sends request to Heureka Overeno service and checks for valid response
     * 
     * @return boolean true
     */
    public function send()
        {
        if (empty($this->email)) {
            throw new HeurekaOverenoException('Customer email address not set');
        }

        // create URL
        $url = $this->getUrl() . '?id=' . $this->apiKey . '&email=' . urlencode($this->email);
        foreach ($this->products as $product) {
            $url .= '&produkt[]=' . urlencode($product);
            }
        foreach ($this->productsItemId as $itemId) {
            $url .= '&itemId[]=' . urlencode($itemId);
            }

        // add order ID
        if (isset($this->orderId)) {
            $url .= '&orderid=' . urlencode($this->orderId);
            }

        // send request and check for valid response
        $contents = $this->sendRequest($url);
        if ($contents == FALSE) {
            throw new HeurekaOverenoException('Unable to create HTTP request to Heureka Overeno service');
            } elseif ($contents == self::RESPONSE_OK) {
            return TRUE;
            } else {
            throw new HeurekaOverenoException($contents);
            }
        }
        /**
     * Adds ordered products using item ID
     *
     * @param string $itemId Ordered product item ID
     */
    public function addProductItemId($itemId)
    {
        $this->productsItemId[] = $itemId;
    }
        /**
     * Adds ordered products using name
     * 
     * Products names should be provided in UTF-8 encoding. The service can handle
     * WINDOWS-1250 and ISO-8859-2 if necessary
     *
     * @param string $productName Ordered product name
     */
    public function addProduct($productName)
    {
        $this->products[] = $productName;
    }
        /**
     * Heureka endpoint URL
     *
     * @var string     
     */
    const BASE_URL = 'http://www.heureka.cz/direct/dotaznik/objednavka.php';
    const BASE_URL_SK = 'http://www.heureka.sk/direct/dotaznik/objednavka.php';

    /**
     * Language IDs
     *
     * @var int     
     */
    const LANGUAGE_CZ = 1;
    const LANGUAGE_SK = 2;
    /**
     * Valid response value
     *
     * @var string     
     */
    const RESPONSE_OK = 'ok';

    /**
     * Shop API key
     *
     * @var string     
     */
    private $apiKey;

    /**
     * Customer email
     *
     * @var string     
     */
    private $email;

    /**
     * Ordered products
     *
     * @var array     
     */
    private $products = array();

    /**
     * Order ID
     *
     * @var int    
     */
    private $orderId;

    /**
     * Current language identifier
     *
     * @var int     
     */
    private $languageId = 1;

    /**
     * Ordered products provided using item ID
     * 
     * @var array
     */
    private $productsItemId = array();

    /**
     * Initialize Heureka Overeno service 
     *
     * @param string $apiKey Shop API key
     * @param int $languageId Language version settings
     */
    public function __construct($apiKey, $languageId = self::LANGUAGE_CZ)
    {
        $this->setApiKey($apiKey);
        $this->languageId = $languageId;
    }

    /**
     * Sets API key and check well-formedness
     * 
     * @param string $apiKey Shop api key
     */
    public function setApiKey($apiKey)
    {
        if (preg_match('(^[0-9abcdef]{32}$)', $apiKey)) {
            $this->apiKey = $apiKey;
        } else {
            throw new OverflowException('Api key ' . $apiKey . ' is invalid.');
        }
    }

    /**
     * Sets customer email
     *
     * @param string $email Customer email address
     */
    public function setEmail($email)
    {
        $this->email = $email;
    }

    // Default options
    add_option( 'wc_nb_newness', '30' );


    // Admin
    add_action( 'woocommerce_settings_image_options_after', array( $this, 'admin_settings' ), 20);
    add_action( 'woocommerce_update_options_catalog', array( $this, 'save_admin_settings' ) );



            /*-----------------------------------------------------------------------------------*/
            /* Class Functions */
            /*-----------------------------------------------------------------------------------*/

            // Load the settings
            function admin_settings() {
                woocommerce_admin_fields( $this->settings );
            }


            // Save the settings
            function save_admin_settings() {
                woocommerce_update_options( $this->settings );
            }

        if (!isset($wpdb)) $wpdb = $GLOBALS['wpdb'];

        $heurekaovereno_ver = '1.00';

        $WC_HO = new WC_HO();
        }
    }
}
?>

这个脚本只有当你把它放在functions.php中时才有效（它有很少的错误，但它有效）这就是我要问的地方，为什么会这样。