我想访问页面上当前显示的产品的ID。我正试图在一个单独的自定义插件中实现这一点。我试过了global $post 和global $product 和get_the_ID() 方法，但不起作用。

<?php
/*
Plugin Name: CleverTap
Plugin URI: https://clevertap.com
Description: CleverTap plugin
Author: CleverTap
Author URI: https://clevertap.com
Version: 1.0.0

    Copyright: © 2015 WizRocket (email : [email protected])
    License: GNU General Public License v3.0
    License URI: http://www.gnu.org/licenses/gpl-3.0.html
*/

/**
 * Check if WooCommerce is active
 */
   $somevar = 0;
if ( in_array( \'woocommerce/woocommerce.php\', apply_filters( \'active_plugins\', get_option( \'active_plugins\' ) ) ) ) {

    if ( ! class_exists( \'CleverTap\' ) ) {

        /**
         * Localisation
         **/
        load_plugin_textdomain( \'clevertap\', false, dirname( plugin_basename( __FILE__ ) ) . \'/\' );

        class CleverTap {

            public function __construct() {
                // called only after woocommerce has finished loading
                add_action( \'woocommerce_init\', array( &$this, \'woocommerce_loaded\' ) );

                // called after all plugins have loaded
                add_action( \'plugins_loaded\', array( &$this, \'plugins_loaded\' ) );

                // called just before the woocommerce template functions are included
                add_action( \'init\', array( &$this, \'include_template_functions\' ), 20 );

                // indicates we are running the admin
                if ( is_admin() ) {
                    // ...
                }

                // indicates we are being served over ssl
                if ( is_ssl() ) {
                    // ...
                }

                // take care of anything else that needs to be done immediately upon plugin instantiation, here in the constructor
                add_action( \'admin_init\', array( &$this, \'clevertap_admin_init\'));
                add_action( \'admin_menu\', array( &$this, \'clevertap_admin_menu\') );

                add_action(\'wp_head\', array( &$this, \'embedajs\'));
                add_action(\'woocommerce_add_to_cart\', array( &$this, \'add\'));

            }

            public function add(){
                GLOBAL $somevar;
                $somevar++; 
                //get the current product id...in $id
                $id=;
                $p=WC()->product_factory->get_product($id)->get_title();
                echo "<script>console.log( \'Debug Objects: " . $p . "\' );</script>";
            }

            /**
             * Take care of anything that needs woocommerce to be loaded.  
             * For instance, if you need access to the $woocommerce global
             */
            public function woocommerce_loaded() {
                // 
            }

            /**
             * Take care of anything that needs all plugins to be loaded
             */
            public function plugins_loaded() {
                // ...
            }

            /**
             * Override any of the template functions from woocommerce/woocommerce-template.php 
             * with our own template functions file
             */
            public function include_template_functions() {
                include( \'clevertap-template.php\' );
            }

        // finally instantiate our plugin class and add it to the set of globals
        $GLOBALS[\'clevertap\'] = new CleverTap();
    }
}

如果有人能帮忙，请帮忙！

谢谢