Notes

<?php
/*
* Plugin Name: My Banner Plugin
* Plugin URI: https://my-banner-pluing.com/
* Description: Handle a basic banner with this plugin.
* Version: 1.0.0
* Requires at least: 5.6
* Requires PHP: 7.2
* Author: Lukman Nakib
* Author URI: https://author.example.com/
* License: GPL v2 or later
* License URI: https://www.gnu.org/licenses/gpl-2.0.html
* Update URI: https://example.com/my-plugin/
* Text Domain: my-banner-plugin
* Domain Path: /languages
*/

class Menu
{
public function __construct()
{
add_action('admin_menu', array($this, 'add_plugin_menu'));
}

public function add_plugin_menu()
{
add_menu_page(
'My Banner Plugin',
'My Banner Plugin',
'manage_options',
'my-banner-plugin',
array($this, 'display_plugin_page'),
'dashicons-admin-plugins',
99
);
}

public function display_plugin_page()
{
// Enqueue JavaScript file
wp_enqueue_script('my-banner-plugin-script', plugin_dir_url(__FILE__) . 'banner-script.js', array('jquery'), '1.0', true);
// Localize script with required settings
wp_localize_script('my-banner-plugin-script', 'my_plugin_settings', array(
'ajax_url' => admin_url('admin-ajax.php'),
'nonce' => wp_create_nonce('my_banner_plugin_nonce'),
));
$settings = get_option('my_banner_settings');
$banner_title = isset($settings['banner_title']) ? $settings['banner_title'] : '';
$description = isset($settings['description']) ? $settings['description'] : '';
$enabled = isset($settings['enabled']) && $settings['enabled'] == 'yes' ?'checked' : '';
echo '<form><table class="form-table" >
<tbody>
<tr>
<th ><label for="banner_title">Site Title</label></th><td><input value="'.$banner_title.'" name="banner_title" type="text" id="banner_title" class="regular-text"></td>
</tr>
<tr>
<th ><label for="description">Description</label></th>
<td><textarea id="banner_description" name="description" class="regular-text">'.$description.'</textarea>
<p class="description" >Banner title and description</p>
</td>
</tr>
<tr>
<th></th>
<td> <input type="checkbox" '.$enabled.' id="enabled" name="enable" value="yes"> Enable</td>
</tr>
<tr>
<th></th>
<td> <button class="submit"><input type="submit" name="submit" id="submit-banner-plugin-settings" class="button button-primary" value="Save Changes"></button> </td>
</tr>
</tbody>
</table></form>';
}
}

new Menu();