Wie füge ich der WordPress-Seite eine WP_List_Table hinzu?

Ich habe WP_List_Table und möchte es einer Seite hinzufügen. Ich habe gesucht und keine Beispiele dafür gesehen. Hat jemand einen Ausschnitt darüber, wie ich dies erreichen kann?

<?php
/*
Plugin Name: Add Parl Plugin 2
Description: To add parliaments
Plugin URI:"http://www.ttparliaments.org"
Author URI: ""
Author: Napoleon Okunna
License: ""
Version: 1.0
*/


global $custom_table_example_db_version;
$custom_table_example_db_version = '1.1'; // version changed from 1.0 to 1.1
  global $wpdb;
    global $custom_table_example_db_version;

    $table_name = $wpdb->prefix . 'oop_parliamentary_info'; // do not forget about tables prefix


/**
 * PART 2. Defining Custom Table List
 * ============================================================================
 *
 * In this part you are going to define custom table list class,
 * that will display your database records in nice looking table
 *
 * http://codex.wordpress.org/Class_Reference/WP_List_Table
 * http://wordpress.org/extend/plugins/custom-list-table-example/
 */

if (!class_exists('WP_List_Table')) {
    require_once(ABSPATH . 'wp-admin/includes/class-wp-list-table.php');
}
/**
 * Custom_Table_Example_List_Table class that will display our custom table
 * records in nice table
 */
class Custom_Table_Example_List_Table extends WP_List_Table
{
    /**
     * [REQUIRED] You must declare constructor and give some basic params
     */
    function __construct()
    {
        global $status, $page;

        parent::__construct(array(
            'singular' => 'person',
            'plural' => 'persons',
        ));
    }

    /**
     * [REQUIRED] this is a default column renderer
     *
     * @param $item - row (key, value array)
     * @param $column_name - string (key)
     * @return HTML
     */
    function column_default($item, $column_name)
    {
        return $item[$column_name];
    }

    /**
     * [OPTIONAL] this is example, how to render specific column
     *
     * method name must be like this: "column_[column_name]"
     *
     * @param $item - row (key, value array)
     * @return HTML
     */
    function column_age($item)
    {
        return '<em>' . $item['age'] . '</em>';
    }

    /**
     * [OPTIONAL] this is example, how to render column with actions,
     * when you hover row "Edit | Delete" links showed
     *
     * @param $item - row (key, value array)
     * @return HTML
     */
    function column_name($item)
    {
        // links going to /admin.php?page=[your_plugin_page][&other_params]
        // notice how we used $_REQUEST['page'], so action will be done on curren page
        // also notice how we use $this->_args['singular'] so in this example it will
        // be something like &person=2
        /*$actions = array(
            'edit' => sprintf('<a href="?page=persons_form&id=%s">%s</a>', $item['id'], __('Edit', 'custom_table_example')),
            'delete' => sprintf('<a href="?page=%s&action=delete&id=%s">%s</a>', $_REQUEST['page'], $item['id'], __('Delete', 'custom_table_example')),
        );

        return sprintf('%s %s',
            $item['Title'],
            $this->row_actions($actions)
        );
        */

  $actions = array(
            'edit'      => sprintf('<a href="?page=%s&action=%s&book=%s">Edit</a>',$_REQUEST['page'],'edit',$item['ParliamentaryID']),
            'delete'    => sprintf('<a href="?page=%s&action=%s&book=%s">Delete</a>',$_REQUEST['page'],'delete',$item['ParliamentaryID']),
        );

  return sprintf('%1$s %2$s', $item['booktitle'], $this->row_actions($actions) );
    }

    /**
     * [REQUIRED] this is how checkbox column renders
     *
     * @param $item - row (key, value array)
     * @return HTML
     */
    function column_cb($item)
    {
        return sprintf(
            '<input type="checkbox" name="id[]" value="%s" />',
            $item['id']
        );
    }

    /**
     * [REQUIRED] This method return columns to display in table
     * you can skip columns that you do not want to show
     * like content, or description
     *
     * @return array
     */
    function get_columns()
    {
        $columns = array(
            'cb' => '<input type="checkbox" />', //Render a checkbox instead of text
            'Title' => __('Title', 'custom_table_example'),
            'StartDate' => __('StartDate', 'custom_table_example'),
            'EndDate' => __('EndDate', 'custom_table_example'),
             'IsCurrent' => __('IsCurrent', 'custom_table_example'),
            // 'ParliamentaryID' => __('Edit', 'custom_table_example','<input type="checkbox" />'),
             ParliamentaryID =>'<a href=#>Edit</a>',

        );
        return $columns;
    }

    /**
     * [OPTIONAL] This method return columns that may be used to sort table
     * all strings in array - is column names
     * notice that true on name column means that its default sort
     *
     * @return array
     */
    function get_sortable_columns()
    {
        $sortable_columns = array(
            'Title' => array('Title', true),
            'StartDate' => array('StartDate', false),
            'EndDate' => array('EndDate', false),
             'IsCurrent' => __('IsCurrent', false),
             'ParliamentaryID'=> __('ParliamentaryID', false),

        );
        return $sortable_columns;
    }

    /**
     * [OPTIONAL] Return array of bult actions if has any
     *
     * @return array
     */
    function get_bulk_actions()
    {
        $actions = array(
            'delete' => 'Delete',
            'edit' =>'Edit'
        );
        return $actions;
    }

    /**
     * [OPTIONAL] This method processes bulk actions
     * it can be outside of class
     * it can not use wp_redirect coz there is output already
     * in this example we are processing delete action
     * message about successful deletion will be shown on page in next part
     */
    function process_bulk_action()
    {
        global $wpdb;
        $table_name = $wpdb->prefix . 'cte'; // do not forget about tables prefix

        if ('delete' === $this->current_action()) {
            $ids = isset($_REQUEST['id']) ? $_REQUEST['id'] : array();
            if (is_array($ids)) $ids = implode(',', $ids);

            if (!empty($ids)) {
                $wpdb->query("DELETE FROM $table_name WHERE id IN($ids)");
            }
        }
        if ('Edit' === $this->current_action()) {
            echo('Edit');
        }
    }

    /**
     * [REQUIRED] This is the most important method
     *
     * It will get rows from database and prepare them to be showed in table
     */
    function prepare_items()
    {
        global $wpdb;
        $table_name = $wpdb->prefix . 'cte'; // do not forget about tables prefix
         $table_name='oop_parliamentary_info';

        $per_page = 5; // constant, how much records will be shown per page

        $columns = $this->get_columns();
        $hidden = array();
        $sortable = $this->get_sortable_columns();

        // here we configure table headers, defined in our methods
        $this->_column_headers = array($columns, $hidden, $sortable);

        // [OPTIONAL] process bulk action if any
        $this->process_bulk_action();

        // will be used in pagination settings
        $total_items = $wpdb->get_var("SELECT COUNT(ParliamentaryID) FROM $table_name");

        // prepare query params, as usual current page, order by and order direction
        $paged = isset($_REQUEST['paged']) ? max(0, intval($_REQUEST['paged']) - 1) : 0;

        $orderby = (isset($_REQUEST['orderby']) && in_array($_REQUEST['orderby'], array_keys($this->get_sortable_columns()))) ? $_REQUEST['orderby'] : 'name';
        $order = (isset($_REQUEST['order']) && in_array($_REQUEST['order'], array('asc', 'desc'))) ? $_REQUEST['order'] : 'asc';



        // [REQUIRED] define $items array
        // notice that last argument is ARRAY_A, so we will retrieve array
        $this->items = $wpdb->get_results($wpdb->prepare("SELECT Title,StartDate,EndDate,ParliamentaryID  FROM oop_parliamentary_info  ", $per_page, $paged), ARRAY_A);
       // $this->items = $wpdb->get_results($wpdb->prepare("SELECT Title,StartDate,EndDate FROM oop_parliamentary_info   ORDER BY $orderby $order LIMIT 100 OFFSET 10 ", $per_page, $paged), ARRAY_A);
        //echo(serialize($this->.);
        //$this->column_name("StartDate");
        //loop thorough this and fpormat 
        foreach ($this->items as $item ) {
                 static $row_class = '';
                   $row_class = ( $row_class == '' ? ' class="alternate"' : '' );

               echo '<tr' . $row_class . '>';
              // $this->single_row_columns( $item );
               echo '</tr>';
        }
        // [REQUIRED] configure pagination
        $this->set_pagination_args(array(
            'total_items' => $total_items, // total items defined above
            'per_page' => $per_page, // per page constant defined at top of method
            'total_pages' => ceil($total_items / $per_page) // calculate pages count
        ));
    }


     function single_row_columns($item) {
       list($columns, $hidden) = $this->get_column_info();
            foreach ($columns as $column_name => $column_display_name) {
                   $class = "class='$column_name column-$column_name'";

                   $style = '';
                   if (in_array($column_name, $hidden))
                         $style = ' style="display:none;"';

                   $attributes = "$class$style";

                   if ('cb' == $column_name) {
                   echo  "<td $attributes>";
                  // echo '<input type="checkbox" name="id[]" value="%s" />', $item['ID'];
                   echo "</td>";
                        }
               elseif ('ParliamentaryID' == $column_name) {
               echo "<td $attributes>";
              //echo '<a href="#">', $item['ParliamentaryID'];
               echo '<a href="#">', '';
               echo "</a>";

                   echo "<div class='row-actions'><span class='edit'>";
           echo sprintf('<a class="editParlRow"  href="?page=%s&action=%s&gid=%s">Edit</a>',$_REQUEST['page'],'edit',$item['ParliamentaryID']);
                   echo "</span> | <span class='trash'>";
           echo sprintf('<a href="?page=%s&action=%s&gid=%s">Delete</a>',$_REQUEST['page'],'delete',$item['ParliamentaryID']);
           echo "</span></div></td>";
                                                    }
            else {
                echo "<td $attributes>";
                echo $this->column_default( $item, $column_name );
                echo "</td>";
            } } } 

}

Ihre WP_List_Table wird anders sein - diese wurde von WP_List_Table angepasst - eine Schritt-für-Schritt-Anleitung und die Verwendung des GIST: Sample-Plugins zur Verwendung der WP_List_Table-Klasse (vollständige Version) . Sie sollten Ihre Methoden so anpassen, dass CSS auch im Front-End enthalten ist (in dieser Antwort nicht enthalten).

WARNUNG :

Da diese Klasse als privat markiert ist, sollten Entwickler diese nur auf eigenes Risiko verwenden, da sich diese Klasse in zukünftigen WordPress-Versionen ändern kann. Entwicklern, die diese Klasse verwenden, wird dringend empfohlen, ihre Plugins mit allen Beta / RC-Versionen von WordPress zu testen, um die Kompatibilität zu gewährleisten.

VORBEREITUNG VORNE

add_action ('init', function(){

   // If we're not in back-end we didn't expect to load these things

   if( ! is_admin() ){

       require_once( ABSPATH . 'wp-admin/includes/class-wp-list-table.php' );
       require_once( ABSPATH . 'wp-admin/includes/screen.php' );
       require_once( ABSPATH . 'wp-admin/includes/class-wp-screen.php' );
       require_once( ABSPATH . 'wp-admin/includes/template.php' );

       global $myListTable;
       $myListTable = new My_Example_List_Table();
   }
});

MACHEN

function my_render_list_page(){

    global $myListTable;

    echo '</pre><div class="wrap"><h2>My List Table Test</h2>';
    $myListTable->prepare_items();

    ?>
    <form method="post">
        <input type="hidden" name="page" value="ttest_list_table">
    <?php

        $myListTable->search_box( 'search', 'search_id' );
        $myListTable->display();

    echo '</form></div>';
}

AUF DEINER SEITE

my_render_list_page();

VERKÜRZTE VERSION

function my_render_list_page(){

    static $myListTable;
    if( ! isset($myListTable)) {
        require_once(ABSPATH . 'wp-admin/includes/class-wp-list-table.php');
        require_once(ABSPATH . 'wp-admin/includes/screen.php');
        require_once(ABSPATH . 'wp-admin/includes/class-wp-screen.php');
        require_once(ABSPATH . 'wp-admin/includes/template.php');
        $myListTable = new My_Example_List_Table();
    }

    echo '</pre><div class="wrap"><h2>My List Table Test</h2>';
    $myListTable->prepare_items();

?>
<form method="post">
    <input type="hidden" name="page" value="ttest_list_table">
<?php

    $myListTable->search_box('search', 'search_id');
    $myListTable->display();

    echo '</form></div>';
}