Codex

Function Reference/get all category ids

Contents

Description

Retrieves all category IDs.

Usage

<?php get_all_category_ids() ?>

Parameters

None.

Return Values

(array) 
A list of all of the category IDs.

Examples

To print a list of categories by id: name

<?php
$category_ids 
get_all_category_ids();
foreach(
$category_ids as $cat_id) {
  
$cat_name get_cat_name($cat_id);
  echo 
$cat_id ': ' $cat_name;
}
?> 

Notes

Change Log

Since: 2.0.0

Source File

get_all_category_ids() is located in wp-includes/category.php.

Related

See also index of Function Reference and index of Template Tags.