How to add the sidebar in all category page

Question

I created custom post type. I created category called product-categories. I listed all categories in sidebar.php. How to show the sidebar in all the category pages listing all the categories. Sidebar.php code is,

'name', 'order' => 'ASC', 'hide_empty' => 0, 'use_desc_for_title' => 1, 'child_of' => 21, 'hierarchical' => 1, 'number' => null, 'echo' => 1, 'taxonomy' => 'product-categories', 'walker' => null, 'title_li' =>'' ); ?>

I want to display this code visible in all the category pages. Please guide me

Answer 1

the following code will work as for per your custom post type

add the following code in sidebar.php to show your custom post type category

<?php
 //list terms in a given taxonomy using wp_list_categories  (also useful as a widget)
  $orderby = 'name';
  $show_count = 0; // 1 for yes, 0 for no
   $pad_counts = 0; // 1 for yes, 0 for no
   $hierarchical = 1; // 1 for yes, 0 for no
  $taxonomy = 'genre';
  $title = '';

  $args = array(
    'orderby' => $orderby,
    'show_count' => $show_count,
    'pad_counts' => $pad_counts,
    'hierarchical' => $hierarchical,
    'taxonomy' => $taxonomy,
     'title_li' => $title
     );
 ?>
  <ul>
 <?php
   wp_list_categories($args);
 ?>
 </ul>

Answer 2

You can use

if(is_category()){
// code stuff
}

This function executes When any Category archive page is being displayed.