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Retrieves all category IDs.
<?php get_all_category_ids() ?>
None.
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;
}
?>
Since: 2.0.0
get_all_category_ids() is located in wp-includes/category.php.
