How to create a list table in admin menu of the WordPress Dashboard with WP_List_Table

				
					<?php
/*
Plugin Name: Custom Admin Menu
Description: Adds a custom admin menu to the WordPress dashboard.
Version: 1.0
Author: WPCOLLEGE
Author URI: https://wpcollege.com
*/

function my_custom_admin_menu() {
    add_menu_page(
        'Custom Admin Page',       // Page title
        'Custom Menu',             // Menu title
        'manage_options',          // Capability
        'custom-admin-page',       // Menu slug
        'custom_admin_page_content', // Function to display content
        'dashicons-admin-site',    // Icon (optional)
        6                          // Position (optional)
    );
}
add_action('admin_menu', 'my_custom_admin_menu');

function custom_admin_page_content() {
    ?>
    <div class="wrap">
        <h1>Custom Admin Page</h1>
        <p>This is the content of the custom admin page!</p>
        <?php
        $table = new Custom_List_Table();
        $table->prepare_items();
        ?>
        <form method="post">
            <?php $table->display(); ?>
        </form>
    </div>
    <?php
}

// Include the WP_List_Table class
if (!class_exists('WP_List_Table')) {
    require_once ABSPATH . 'wp-admin/includes/class-wp-list-table.php';
}

class Custom_List_Table extends WP_List_Table {

    function get_columns() {
        return array(
            'cb'          => '<input type="checkbox" />',
            'item_name'   => 'Item Name',
            'item_desc'   => 'Item Description',
        );
    }

    function get_bulk_actions() {
        return array(
            'delete' => 'Delete Selected',
        );
    }

    function prepare_items() {
        $this->items = $this->get_data();
        $this->_column_headers = array($this->get_columns(), array(), array());
    }

    function process_bulk_action() {
        // Check user capabilities
        if ('delete' === $this->current_action()) {
            // Handle the deletion of selected items
            if (isset($_POST['item']) && is_array($_POST['item'])) {
                foreach ($_POST['item'] as $item) {
                    // Implement deletion logic here
                }
                // Add a success notice or handle the deletion confirmation
                add_filter('pre_admin_notices', function() {
                    echo '<div class="notice notice-success"><p>Selected items deleted!</p></div>';
                });
            }
        }
    }

    function get_data() {
        // Sample data, replace with your own data retrieval logic
        return array(
            array('item_name' => 'Item 1', 'item_desc' => 'Description for item 1'),
            array('item_name' => 'Item 2', 'item_desc' => 'Description for item 2'),
            array('item_name' => 'Item 3', 'item_desc' => 'Description for item 3'),
        );
    }

    function column_cb($item) {
        return sprintf('<input type="checkbox" name="item[]" value="%s" />', esc_attr($item['item_name']));
    }

    function column_item_name($item) {
        return esc_html($item['item_name']);
    }

    function column_item_desc($item) {
        return esc_html($item['item_desc']);
    }
}

// Hook to process bulk actions
add_action('admin_post_custom_bulk_action', array('Custom_List_Table', 'process_bulk_action'));