I'm trying to deduce a category for my custom WordPress post, but I get this error. How to fix ?

$events= wp_get_post_terms(get_the_ID(), 'events', array("fields" => "all"));
<?php echo $events[0]->name ?>

add_action( 'init', 'cptui_register_my_cpts' );
function cptui_register_my_cpts() {
  $labels = array(
    "name" => __( 'Events', '' ),
    "singular_name" => __( 'event', '' ),
    );

  $args = array(
    // HERE
    "label" => __( 'Events', '' ),
    "labels" => $labels,
    "description" => "",
    "public" => true,
    "publicly_queryable" => true,
    "show_ui" => true,
    "show_in_rest" => false,
    "rest_base" => "",
    "has_archive" => false,
    "show_in_menu" => true,
    "exclude_from_search" => true,
    "capability_type" => "post",
    "map_meta_cap" => true,
    "hierarchical" => false,
    "rewrite" => array( "slug" => "events", "with_front" => false ),
    "query_var" => true,

    "supports" => array( "title", "editor", "thumbnail", "excerpt", "revisions" ),          );
  register_post_type( "events", $args );

// End of cptui_register_my_cpts()
}

I'm trying to deduce a category for my custom WordPress post, but I get this error. How to fix ?

$events= wp_get_post_terms(get_the_ID(), 'events', array("fields" => "all"));
<?php echo $events[0]->name ?>

add_action( 'init', 'cptui_register_my_cpts' );
function cptui_register_my_cpts() {
  $labels = array(
    "name" => __( 'Events', '' ),
    "singular_name" => __( 'event', '' ),
    );

  $args = array(
    // HERE
    "label" => __( 'Events', '' ),
    "labels" => $labels,
    "description" => "",
    "public" => true,
    "publicly_queryable" => true,
    "show_ui" => true,
    "show_in_rest" => false,
    "rest_base" => "",
    "has_archive" => false,
    "show_in_menu" => true,
    "exclude_from_search" => true,
    "capability_type" => "post",
    "map_meta_cap" => true,
    "hierarchical" => false,
    "rewrite" => array( "slug" => "events", "with_front" => false ),
    "query_var" => true,

    "supports" => array( "title", "editor", "thumbnail", "excerpt", "revisions" ),          );
  register_post_type( "events", $args );

// End of cptui_register_my_cpts()
}

• custom-post-types
• categories

• You have not added 'taxonomies' => array('topics', 'category' ), in args array() – Dharmishtha Patel Commented Jan 29, 2020 at 7:24

1 Answer 1

wp_get_post_terms() will return a WP_Error object if the taxonomy can't be found. So $events[0] won't exist if that happens.

If you're getting this error it means that there's no taxonomy named events registered on your site. So you'll need to make sure that you've used the correct name for the taxonomy whose terms you want to list.