将此代码添加到插件文件中以注册激活挂钩

// register activation hook
register_activation_hook( __FILE__, \'my_rating_plugin_activation\' );

function my_rating_plugin_activation() {
    global $wpdb, $rating_table_name;
    if($wpdb->get_var("SHOW TABLES LIKE \\"$rating_table_name\\"") != $rating_table_name) {
        $wpdb->query("CREATE TABLE IF NOT EXISTS $rating_table_name (
            rating_id int(11) NOT NULL AUTO_INCREMENT,
            rating_postid int(11) NOT NULL,
            rating_posttitle text NOT NULL,
            rating_rating int(2) NOT NULL,
            rating_timestamp varchar(15) NOT NULL,
            rating_ip varchar(40) NOT NULL,
            rating_host varchar(200) NOT NULL,
            rating_username varchar(50) NOT NULL,
            rating_userid int(10) NOT NULL DEFAULT \'0\',
            comment_id int(11) NOT NULL,
            PRIMARY KEY (rating_id)
        ) ENGINE=MyISAM");
    }
}