如何创建一个wordpress插件谁是在wp-admin/post.php页面工作

我想创建一个wp插件从数据库显示记录。我在数据库中添加了一个表，并希望在post.php页面编辑器下的wp-admin post.php页面中获取和显示记录。

我有post_id在我的表作为外键。所以我想获取记录的选定的post_id。

这是我的插件代码.....

<?php
    /*
        Plugin Name: Kiosk User Info
        Plugin URI: http://pixako.com
        Description: This is Kiosk User Info.
        Author: Muhammad Asfund Yar - Pixako
        Version: 1.0
        Author URI: http://pixako.com
    */
    /* Plugin Main Page/Setting Page*/
    function KioskUserInfo_mainPage(){
        echo "<br />This is main page of plugin<br /> Go to the post page. here we are using it. <br /> Thanks";
    }

    /*Plugin Working Area*/
    function KioskUserInfo_postPage(){
        echo "I want this code to show in wp-admin/post.php page under editor.";
    }
    add_action( 'registered_post_type', 'KioskUserInfo_postPage' );

    /*Menu Links*/
    function KioskUserInfo_menu(){
        add_menu_page('Kiosk User Information Plugin','Kiosk User Info', 'manage_options','kiosk-user-info-mainpage','KioskUserInfo_mainPage');
    }
    add_action('admin_menu','KioskUserInfo_menu');
?>