custom-views-wordpress.php

<?php
/**
 * WordPress Sandbox
 *
 * @package WordPress_Sandbox
 * @subpackage current-screen-test
 * @author Jess Green <jgreen@psy-dreamer.com>
 * @version $Id$
 */

add_action('current_screen', '_current_screen_test');
function _current_screen_test()
{   
}

add_filter('views_edit-post', '_edit_posts_screen');
/**
 * Add our tab
 * 
 * @param array $views
 * @return array
 */
function _edit_posts_screen($views)
{
    $views['archive'] = "<a href='edit.php?post_status=archived'>Archive <span class='count'>(0)</span></a>";
    
    return $views;
}

/**
 * Adds new variables to query var list.
 * Only use if you need to add new query vars
 *
 * @param array $vars Current list of query vars
 * @return array
 */
//add_filter('query_vars','_add_query_vars');
//function _add_query_vars($vars)
//{
//    array_push($vars, 'archive-category');   
//    return $vars;
//}


add_filter('pre_get_posts', '_create_editposts_filter');
/**
 * Create a filter specifically for the post listing screen
 * 
 * @param WP_Query $query
 * @return WP_Query
 */
function _create_editposts_filter(WP_Query $query)
{
    $screen = get_current_screen();
    if (isset($screen->id) && $screen->id == 'edit-post') {
        $query = apply_filters('pre_get_posts-edit-post', $query);
    }
    
    return $query;
}

add_filter('pre_get_posts-edit-post', '_pre_get_posts_edit_post');
function _pre_get_posts_edit_post(WP_Query $query)
{
    if (isset($_REQUEST['post_status']) && $_REQUEST['post_status'] == 'archived') {
        $query->set('post_status', 'archived');
//        var_dump($query); die();
    }
    
    return $query;
}