How to create wordpres plugins custom admin menu

How to create wordpres plugins custom admin menu

1. first create folder wp-content\plugins\admin_menu
2. create php file admin.php

Code

<?php
/**
* Plugin Name: Admin Menu
* Plugin URI: https://tutorial101.blogspot.com/
* Description: A custom admin menu.
* Version: 1.0
* Author: Cairocoders
* Author URI: http://tutorial101.blogspot.com/
**/
function theme_options_panel(){
  add_menu_page('Theme page title', 'Theme menu', 'manage_options', 'theme-options', 'wps_theme_func');
  add_submenu_page('theme-options', 'Settings page title', 'Settings menu label', 'manage_options', 'theme-op-settings', 'wps_theme_func_settings');
  add_submenu_page('theme-options', 'FAQ page title', 'FAQ menu label', 'manage_options', 'theme-op-faq', 'wps_theme_func_faq');
}
add_action('admin_menu', 'theme_options_panel');
//function
function wps_theme_func(){
        echo '<div class="wrap"><div id="icon-options-general" class="icon32"><br></div>
        <h2>Theme</h2></div>';
}
function wps_theme_func_settings(){
        echo '<div class="wrap"><div id="icon-options-general" class="icon32"><br></div>
        <h2>Settings</h2></div>';
}
function wps_theme_func_faq(){
        echo '<div class="wrap"><div id="icon-options-general" class="icon32"><br></div>
        <h2>FAQ</h2></div>';
}