how to display all categories in wordpress?

Question

I used this code:

      $categories = wp_get_post_categories(get_the_ID());
      foreach($categories as $category){
          echo \'


        
      

Answer 1

You can also use wp_list_categories and pass arguments to it to show only what you need. A full list of arguments can be found in the codex: https://developer.wordpress.org/reference/functions/wp_list_categories

This will output all categories (even if they're empty) indented to indicate hierarchy.

$args = array(
    'child_of'            => 0,
    'current_category'    => 0,
    'depth'               => 0,
    'echo'                => 1,
    'exclude'             => '',
    'exclude_tree'        => '',
    'feed'                => '',
    'feed_image'          => '',
    'feed_type'           => '',
    'hide_empty'          => 0,
    'hide_title_if_empty' => false,
    'hierarchical'        => true,
    'order'               => 'ASC',
    'orderby'             => 'name',
    'separator'           => '
',
    'show_count'          => 0,
    'show_option_all'     => '',
    'show_option_none'    => __( 'No categories' ),
    'style'               => 'list',
    'taxonomy'            => 'category',
    'title_li'            => __( 'Categories' ),
    'use_desc_for_title'  => 1,
);

var_dump( wp_list_categories($args) );