Create custom table with WP_Liste_Table for star

star-candidats.php

<?php
/*
 * Plugin Name: Star Candidats
 * Description: Liste des candidats qui ont postuler sur les offres star.
 * Plugin URI: https://gist.github.com/iamando/8389c81a88afec8baf74c51c3b91112d
 * Author: Ando
 * Author URI: https://github.com/iamando
 * Version: 1.0
 * License: GPL2
 */

if (is_admin()) {
    new Candidates_Wp_List_Table();
}

/**
 * Candidates_Wp_List_Table class will create the page to load the table
 */
class Candidates_Wp_List_Table
{
    /**
     * Constructor will create the menu item
     */
    public function __construct()
    {
        add_action('admin_menu', array($this, 'add_menu_candidats_list_table_page'));
    }

    /**
     * Menu item will allow us to load the page to display the table
     */
    public function add_menu_candidats_list_table_page()
    {
        add_menu_page('Candidats', 'Candidats', 'manage_options', 'candidats', array($this, 'list_candidats_table_page'), 'dashicons-format-aside');
    }

    /**
     * Display the list table page
     *
     * @return Void
     */
    public function list_candidats_table_page()
    {
        $candidatesListTable = new Candidats_List_Table();
        $candidatesListTable->prepare_items();
?>
        <div class="wrap">
            <div id="icon-users" class="icon32"></div>
            <h2>Liste des candidats</h2>
            <?php $candidatesListTable->display(); ?>
        </div>
<?php
    }
}

// WP_List_Table is not loaded automatically so we need to load it in our application
if (!class_exists('WP_List_Table')) {
    require_once(ABSPATH . 'wp-admin/includes/class-wp-list-table.php');
}

/**
 * Create a new table class that will extend the WP_List_Table
 */
class Candidats_List_Table extends WP_List_Table
{
    /**
     * Prepare the items for the table to process
     *
     * @return Void
     */
    public function prepare_items()
    {
        $columns = $this->get_columns();
        $hidden = $this->get_hidden_columns();
        $sortable = $this->get_sortable_columns();

        $data = $this->table_data();
        usort($data, array(&$this, 'sort_data'));

        $perPage = 10;
        $currentPage = $this->get_pagenum();
        $totalItems = count($data);

        $this->set_pagination_args(array(
            'total_items' => $totalItems,
            'per_page'    => $perPage
        ));

        $data = array_slice($data, (($currentPage - 1) * $perPage), $perPage);

        $this->_column_headers = array($columns, $hidden, $sortable);
        $this->items = $data;
    }

    /**
     * Override the parent columns method. Defines the columns to use in your listing table
     *
     * @return Array
     */
    public function get_columns()
    {
        $columns = array(
            'id'          =>  'ID',
            'name'        =>  'Nom',
            'firstName'   =>  'Prenom',
            'phone'       =>  'Telephone',
            'email'       =>  'Email',
            'fileUrl'     =>  'Fichier'
        );

        return $columns;
    }

    /**
     * Define which columns are hidden
     *
     * @return Array
     */
    public function get_hidden_columns()
    {
        return array();
    }

    /**
     * Define the sortable columns
     *
     * @return Array
     */
    public function get_sortable_columns()
    {
        return array('name' => array('name', false));
    }

    /**
     * Get the table data
     *
     * @return Array
     */
    private function table_data()
    {
        global $wpdb;

        $table = $wpdb->prefix . 'candidates';
        $data = $wpdb->get_results("SELECT * FROM $table", ARRAY_A);

        if ($data === false) {
            echo 'Erreur lors de la requête SQL : ' . $wpdb->last_error;
            return;
        }

        return $data;
    }

    /**
     * Define what data to show on each column of the table
     *
     * @param  Array $item        Data
     * @param  String $column_name - Current column name
     *
     * @return Mixed
     */
    public function column_default($item, $column_name)
    {
        switch ($column_name) {
            case 'id':
            case 'name':
            case 'firstName':
            case 'phone':
            case 'email':
            case 'fileUrl':
                return $item[$column_name];

            default:
                return print_r($item, true);
        }
    }

    /**
     * Allows you to sort the data by the variables set in the $_GET
     *
     * @return Mixed
     */
    private function sort_data($a, $b)
    {
        // Set defaults
        $orderby = 'name';
        $order = 'asc';

        // If orderby is set, use this as the sort column
        if (!empty($_GET['orderby'])) {
            $orderby = $_GET['orderby'];
        }

        // If order is set use this as the order
        if (!empty($_GET['order'])) {
            $order = $_GET['order'];
        }

        $result = strcmp($a[$orderby], $b[$orderby]);

        if ($order === 'asc') {
            return $result;
        }

        return -$result;
    }
}
?>