Category分类管理页面添加字段

<?php // Add custom field to category add new screen
function add_category_custom_fields() {
    ?>
    <div class="form-field">
        <label for="custom_field"><?php _e('Custom Field'); ?></label>
        <input type="text" name="custom_field" id="custom_field" value="">
        <p class="description"><?php _e('Enter custom field value here.'); ?></p>
    </div>
    <?php
}
add_action('category_add_form_fields', 'add_category_custom_fields');

// Save custom field value when a new category is created
function save_category_custom_fields($term_id) {
    if (isset($_POST['custom_field'])) {
        $custom_field_value = sanitize_text_field($_POST['custom_field']);
        add_term_meta($term_id, 'custom_field', $custom_field_value, true);
    }
}
add_action('created_category', 'save_category_custom_fields');

// Add custom field to category edit screen
function edit_category_custom_fields($tag) {
    $term_id = $tag->term_id;
    $custom_field_value = get_term_meta($term_id, 'custom_field', true); // Fetch existing value if any

    ?>
    <tr class="form-field">
        <th scope="row" valign="top">
            <label for="custom_field"><?php _e('Custom Field'); ?></label>
        </th>
        <td>
            <input type="text" name="custom_field" id="custom_field" value="<?php echo esc_attr($custom_field_value); ?>">
            <p class="description"><?php _e('Enter custom field value here.'); ?></p>
        </td>
    </tr>
    <?php
}
add_action('category_edit_form_fields', 'edit_category_custom_fields');

// Save custom field value when category is edited
function update_category_custom_fields($term_id) {
    if (isset($_POST['custom_field'])) {
        $custom_field_value = sanitize_text_field($_POST['custom_field']);
        update_term_meta($term_id, 'custom_field', $custom_field_value);
    }
}
add_action('edited_category', 'update_category_custom_fields');