'Page Categories',
'hierarchical' => true,
'public' => true,
'show_ui' => true,
'show_in_rest' => true,
]);
}
add_action('init', 'add_page_categories_taxonomy');
// For WP-CLI (where 'init' may not trigger reliably)
if (defined('WP_CLI') && WP_CLI) {
WP_CLI::add_hook('after_wp_load', function () {
register_page_category_taxonomy();
});
}
// Add a new column to the Pages list
add_filter('manage_page_posts_columns', 'add_page_category_column');
function add_page_category_column($columns)
{
$new_columns = array();
foreach ($columns as $key => $value) {
$new_columns[$key] = $value;
if ('author' === $key) {
$new_columns['page_category'] = 'Categories';
}
}
return $new_columns;
}
// Populate the custom column with taxonomy terms
add_action('manage_page_posts_custom_column', 'show_page_category_column', 10, 2);
function show_page_category_column($column, $post_id)
{
if ('page_category' === $column) {
$terms = get_the_terms($post_id, 'page_category');
if (!empty($terms) && !is_wp_error($terms)) {
$links = array();
foreach ($terms as $term) {
$url = admin_url('edit.php?post_type=page&page_category=' . $term->slug);
$links[] = '' . esc_html($term->name) . '';
}
echo implode(', ', $links);
} else {
echo '—';
}
}
}
// filter taxonomy
add_action('restrict_manage_posts', 'filter_page_by_top_level_category');
function filter_page_by_top_level_category()
{
global $typenow;
if ($typenow !== 'page') return;
$taxonomy = 'page_category';
$terms = get_terms([
'taxonomy' => $taxonomy,
'parent' => 0, // 👈 Only top-level categories
'hide_empty' => false,
]);
if (!empty($terms)) {
echo '';
}
}
add_filter('parse_query', 'apply_top_level_category_filter');
function apply_top_level_category_filter($query)
{
global $pagenow;
if (
$pagenow === 'edit.php' &&
$query->is_main_query() &&
isset($_GET['page_category']) &&
!empty($_GET['page_category']) &&
$query->get('post_type') === 'page'
) {
$taxonomy = 'page_category';
$term_slug = sanitize_text_field($_GET['page_category']);
// Get full term object by slug
$term = get_term_by('slug', $term_slug, $taxonomy);
if ($term && !is_wp_error($term)) {
$query->set('tax_query', [[
'taxonomy' => $taxonomy,
'field' => 'term_id',
'terms' => [$term->term_id],
'include_children' => true, // 👈 Includes all subcategories too
'operator' => 'IN' // Matches pages with this term, even with others
]]);
}
}
}
// 1️⃣ Add the Last Modified column
add_filter('manage_page_posts_columns', function($columns) {
$columns['modified_date'] = 'Last Modified';
return $columns;
});
// 2️⃣ Display the modified time
add_action('manage_page_posts_custom_column', function($column, $post_id) {
if ($column === 'modified_date') {
echo get_post_modified_time('F j, Y g:i a', false, $post_id);
}
}, 10, 2);
// 3️⃣ Make it sortable
add_filter('manage_edit-page_sortable_columns', function($columns) {
$columns['modified_date'] = 'modified_date';
return $columns;
});
// 4️⃣ Handle the sorting logic
add_action('pre_get_posts', function($query) {
if (!is_admin() || !$query->is_main_query()) {
return;
}
if ($query->get('orderby') === 'modified_date') {
$query->set('orderby', 'modified');
}
});
// Taxonomy based templates
add_action('admin_init', 'generate_page_category_templates');
function generate_page_category_templates()
{
// Define plugin directory and template folder
$plugin_dir = plugin_dir_path(__FILE__);
$template_dir = $plugin_dir . 'templates/';
if (!is_dir($template_dir)) {
mkdir($template_dir); // Create if not exists
}
// Get all top-level terms
$terms = get_terms([
'taxonomy' => 'page_category',
'parent' => 0,
'hide_empty' => false,
]);
foreach ($terms as $term) {
$slug = $term->slug;
$filename = "taxonomy-page_category-{$slug}.php";
$filepath = $template_dir . $filename;
if (!file_exists($filepath)) {
// Create a basic scaffold file
file_put_contents($filepath, "name}'\nget_header();\n?>
Category: name}'); ?>
");
}
}
}