Admin – custom column – wyświetlanie taxonomii i edycja za pomocą AJAX.

// zarejestruj kolumne
function add_custom_column_to_post_list($columns) {
    $columns['your_column_name'] = 'Column Name';
    return $columns;
}
add_filter('manage_posts_columns', 'add_custom_column_to_post_list');

//wyswietl w kolumnie taxo
function display_custom_column_content($column, $post_id) {
    if ($column === 'your_column_name') {
        $terms = wp_get_post_terms($post_id, 'your_taxonomy_name', array("fields" => "all"));
        if (!empty($terms) && !is_wp_error($terms)) {
            $term_names = array();
            foreach ($terms as $term) {
                $term_names[] = $term->name;
            }
            echo '<span class="custom-column-content">' . implode(', ', $term_names) . '</span>';
            echo '<button class="button edit-custom-taxonomy" data-post-id="' . $post_id . '">Edit</button>';
        } else {
            echo '-';
        }
    }
}
add_action('manage_posts_custom_column', 'display_custom_column_content', 10, 2);

// ajax do edycji
function handle_custom_taxonomy_edit() {
    $post_id = isset($_POST['post_id']) ? intval($_POST['post_id']) : 0;
    $term_value = isset($_POST['term_value']) ? sanitize_text_field($_POST['term_value']) : '';

    if ($post_id && $term_value) {
        $term = term_exists($term_value, 'your_taxonomy_name');
        if ($term) {
            wp_set_post_terms($post_id, $term['term_id'], 'your_taxonomy_name');
            echo 'success';
        } else {
            echo 'error';
        }
    } else {
        echo 'error';
    }

    die();
}
add_action('wp_ajax_custom_taxonomy_edit', 'handle_custom_taxonomy_edit');

// dodaj JS do ajaxa
function custom_taxonomy_edit_script() {
    ?>
    <script>
        jQuery(document).ready(function($) {
            $('.edit-custom-taxonomy').on('click', function() {
                var post_id = $(this).data('post-id');
                var term_value = prompt('Enter new taxonomy value:');
                if (term_value !== null && term_value !== '') {
                    $.ajax({
                        url: ajaxurl,
                        type: 'POST',
                        data: {
                            action: 'custom_taxonomy_edit',
                            post_id: post_id,
                            term_value: term_value
                        },
                        success: function(response) {
                            if (response === 'success') {
                                alert('Taxonomy value updated successfully.');
                                location.reload();
                            } else {
                                alert('Error occurred while updating taxonomy value.');
                            }
                        }
                    });
                }
            });
        });
    </script>
    <?php
}
add_action('admin_footer-edit.php', 'custom_taxonomy_edit_script');