wp_cache_add( int|string $key, mixed $data, string $group = '', int $expire )

Adds data to the cache, if the cache key doesn’t already exist.

Description

See also

Parameters

$key

(int|string) (Required) The cache key to use for retrieval later.

$data

(mixed) (Required) The data to add to the cache.

$group

(string) (Optional) The group to add the cache to. Enables the same key to be used across groups.

Default value: ''

$expire

(int) (Optional) When the cache data should expire, in seconds. Default 0 (no expiration).

Return

(bool) False if cache key and group already exist, true on success.

Source

File: wp-includes/cache.php 

function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
	global $wp_object_cache;

	return $wp_object_cache->add( $key, $data, $group, (int) $expire );
}

Expand Source Code View on GitHub

Related

Uses

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

Adds data to the cache if it doesn’t already exist.

Used By

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

Retrieves all category IDs.
wp-includes/class-wp-term.php: WP_Term::get_instance()

Retrieve WP_Term instance.
wp-includes/class-wp-network.php: WP_Network::get_instance()

Retrieve a network from the database by its ID.
wp-includes/class-wp-network.php: WP_Network::get_main_site_id()

Returns the main site ID for the network.
wp-includes/class-wp-network.php: WP_Network::get_by_path()

Retrieve the closest matching network for a domain and path.
wp-includes/class-wp-post.php: WP_Post::get_instance()

Retrieve WP_Post instance.
wp-includes/class-wp-comment.php: WP_Comment::get_instance()

Retrieves a WP_Comment instance.
wp-includes/class-wp-network-query.php: WP_Network_Query::get_networks()

Gets a list of networks matching the query vars.
wp-includes/comment.php: update_comment_cache()

Updates the comment cache of given comments.
wp-includes/bookmark.php: get_bookmark()

Retrieve Bookmark data
wp-includes/ms-load.php: ms_load_current_site_and_network()

Identifies the network and site of a requested domain and path and populates the corresponding network and site global objects as part of the multisite bootstrap process.
wp-includes/class-wp-site.php: WP_Site::get_instance()

Retrieves a site from the database by its ID.
wp-includes/ms-blogs.php: update_network_cache()

Updates the network cache of given networks.
wp-includes/ms-blogs.php: update_site_cache()

Updates sites in cache.
wp-includes/meta.php: update_meta_cache()

Update the metadata cache for the specified objects.
wp-includes/user.php: update_user_caches()

Update all user caches
wp-includes/class-wp-theme.php: WP_Theme::cache_add()

Adds theme data to cache.
wp-includes/category-template.php: get_the_terms()

Retrieve the terms of the taxonomy that are attached to the post.
wp-includes/option.php: get_option()

Retrieves an option value based on an option name.
wp-includes/option.php: wp_load_alloptions()

Loads and caches all autoloaded options, if available or all options.
wp-includes/class-wp-term-query.php: WP_Term_Query::get_terms()

Get terms, based on query_vars.
wp-includes/post.php: update_post_cache()

Updates posts in cache.
wp-includes/post.php: wp_mime_type_icon()

Retrieve the icon for a MIME type.
wp-includes/post.php: get_all_page_ids()

Get a list of page IDs.
wp-includes/class-wp-site-query.php: WP_Site_Query::get_sites()

Retrieves a list of sites matching the query vars.
wp-includes/class-wp-comment-query.php: WP_Comment_Query::get_comments()

Get a list of comments matching the query vars.
wp-includes/taxonomy.php: update_term_cache()

Updates Terms to Taxonomy in cache.
wp-includes/taxonomy.php: update_object_term_cache()

Updates the cache for the given term object ID(s).
wp-admin/includes/template.php: get_inline_data()

Adds hidden fields with the data for use in the inline editor for posts and pages.
wp-admin/includes/taxonomy.php: get_terms_to_edit()

Get comma-separated list of terms available to edit for the given post ID.
Show 25 more used by Hide more used by

Changelog

Changelog
Version Description
WP-2.0.0 Introduced.