This function has been deprecated. Use get_terms() instead.

get_all_category_ids()

Retrieves all category IDs.

Description

See also

Return

(object) List of all of the category IDs.

Source

File: wp-includes/deprecated.php 

function get_all_category_ids() {
	_deprecated_function( __FUNCTION__, 'WP-4.0.0', 'get_terms()' );

	if ( ! $cat_ids = wp_cache_get( 'all_category_ids', 'category' ) ) {
		$cat_ids = get_terms( 'category', array('fields' => 'ids', 'get' => 'all') );
		wp_cache_add( 'all_category_ids', $cat_ids, 'category' );
	}

	return $cat_ids;
}

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Related

Uses

Uses
Uses Description
wp-includes/cache.php: wp_cache_get()

Retrieves the cache contents from the cache by key and group.
wp-includes/cache.php: wp_cache_add()

Adds data to the cache, if the cache key doesn’t already exist.
wp-includes/taxonomy.php: get_terms()

Retrieve the terms in a given taxonomy or list of taxonomies.
wp-includes/functions.php: _deprecated_function()

Mark a function as deprecated and inform when it has been used.

Used By

Used By
Used By Description
wp-includes/deprecated.php: get_category_children()

Retrieve category children list separated before and after the term IDs.

Changelog

Changelog
Version Description
WP-4.0.0 Use get_terms()
WP-2.0.0 Introduced. This function has been deprecated. Use get_terms() instead.