how to create custom plugin deactivate hook and display all post in wordpress?

 how to create custom plugin deactivate hook and display all post in wordpress?

make new folder in plugin after whatever you want your folder name, remember that file name and folder name same .

make folder in this folder wp-content/plugins/
exmaple : wp-content/plugins/viral/viral.php
viral is your plugin folder and viral.php is your plugin file
now add code in viral.php file.

viral.php

<?php
/**
 * @package viral
 */
/*
plugin Name: vira-plugin
plugin URI: https://vdcodin.blogspot.com/
Description: this is my custom plugin made by your name other wise details about plugin
Version: 4.1.7
Author: viral
Author URI: https://vdcodin.blogspot.com/
License: GPLv2 or later
text Domain: viral
*/
add_action('admin_menu','viral_menu');
function viral_menu(){
    add_menu_page(
        'viral', // page title
        'viral', // menu title
        'manage_options', // by-default admin site
        'dashboard', // this is called page slug
        'my_function',// callback function which we called
        'dashicons-dashboard', // this is our icon
        6      //  this is our plugin position 
    );
    //we have only one sub menu then why its showing 2?
    //lets make this one
    add_submenu_page(
        'dashboard', // parent slug beause we need submenu of this menu
        'first submenu', // page title
        'first submenu', // menu title
        'manage_options', // by-default admin site
        'dashboard', // menu slug
        'my_function' //call function which we click on sub menu and open that page      
    );
    add_submenu_page(
        'dashboard', // parent slug beause we need submenu of this menu
        'second submenu', // page title
        'second submenu', // menu title
        'manage_options', // by-default admin site
        'second-submenu', // menu slug
        'second_submenu' //call function which we click on sub menu and open that page      
    );  
    add_submenu_page(
        'dashboard', // parent slug beause we need submenu of this menu
        'third submenu', // page title
        'third submenu', // menu title
        'manage_options', // by-default admin site
        'third-submenu', // menu slug
        'third_submenu' //call function which we click on sub menu and open that page      
    );  
}
//directory
define("PLUGIN_DIR_PATH", PLUGIN_DIR_PATH(__FILE__));
function my_function(){
    include_once PLUGIN_DIR_PATH . '/include/first.php';
}
function second_submenu(){
    include_once PLUGIN_DIR_PATH . '/include/second.php';
}
function third_submenu(){
    include_once PLUGIN_DIR_PATH . '/include/third.php';
}
//now we make table and page automatically when we activat  our plugin
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
register_activation_hook(__FILE__,'table_activate');
register_activation_hook(__FILE__, 'create_page');
//deactivate hook

//drop table when plugindelete
function table_activate(){
    global $wpdb;
    $sql = "CREATE TABLE `wp_registration` (
        `id` int(11) NOT NULL AUTO_INCREMENT,
        `first_name` varchar(30) NOT NULL,
        `last_name` varchar(30) NOT NULL,
        `email` varchar(30) NOT NULL,
        `password` varchar(15) NOT NULL,
        `phone_no` bigint(10) NOT NULL,
        `reg_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
        PRIMARY KEY (`id`)
       ) ENGINE=InnoDB DEFAULT CHARSET=latin1";
       $wpdb->query($sql);
}
// when we click on activate table made automatically when our plugin activate
//now we make our page too
function create_page()
{
    $page = array();
    $page['post_title'] = "custom page";
    $page['post_content'] = "this is our custom page when you active out plugin this page also created with plugin";
    $page['post_statud'] = "publish";
    $page['post_slug'] = "custom-page"; 
    $page['post_type'] = "page";// this slug make you choice either page or post which is ?
    $post_id = wp_insert_post($page);
    add_option("custom_plugin_page", $post_id);
    
}
register_deactivation_hook(__FILE__, 'deactivate');
//in this tutorial we deactivate our plug in and deactivate out table too.
function deactivate(){
    global $wpdb;
    $sql = "drop table wp_registration";
    $wpdb->query($sql);
}
//now we are going to fetch all our post in one page

?>

make another folder in wp-content/plugins/viral
exmaple : wp-content/plugins/viral/include
viral is your plugin folder and include is subfolder of your viral folder
now make another file in inlcude folder name first.php

example : wp-content/plugins/viral/includefirst.php

first.php

<?php 
$args = array(
    'post_type' => 'post',
    'orderby' => 'ID',
    'post_status' => 'publish', //we fetch our publish post
    'order' => 'DESC',
    'post_per_page' => -1 //here how much post you want to show
    //if you erite -1 then your all post arwe fetch if you write 2 then your  2 post are fetch
);
$result = new WP_Query($args);
if($result->have_posts()){
    while($result->have_posts()){
        $result->the_post();
        ?>
        <h1> <?php the_title(); ?></h1>
        <?php the_content(); ?>
        <?php
    }
    wp_reset_postdata();
}
else{
    echo "oh sorry for that but there have no post yet!";
}
?>

if you still confused watch my video:

video link : 

https://youtu.be/9ZnZEhDFF40