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wp_cache_add()

wp_cache_add( int|string $key, mixed $data, string $group, int $expire ): bool

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

Description

See also

Parameters

$keyint|stringrequired
The cache key to use for retrieval later.
$datamixedrequired
The data to add to the cache.
$groupstringoptional
The group to add the cache to. Enables the same key to be used across groups. Default empty.
$expireintoptional
When the cache data should expire, in seconds.
Default 0 (no expiration).

Return

bool True on success, false if cache key and group already exist.

Source

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

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

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UsesDescription
WP_Object_Cache::add()wp-includes/class-wp-object-cache.php

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

Used byDescription
ms_load_current_site_and_network()wp-includes/ms-load.php

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_Site::get_instance()wp-includes/class-wp-site.php

Retrieves a site from the database by its ID.

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

Retrieves a network from the database by its ID.

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

Retrieves a WP_Comment instance.

WP_Term::get_instance()wp-includes/class-wp-term.php

Retrieve WP_Term instance.

get_terms_to_edit()wp-admin/includes/taxonomy.php

Gets comma-separated list of terms available to edit for the given post ID.

get_inline_data()wp-admin/includes/template.php

Adds hidden fields with the data for use in the inline editor for posts and pages.

get_the_terms()wp-includes/category-template.php

Retrieves the terms of the taxonomy that are attached to the post.

WP_Theme::cache_add()wp-includes/class-wp-theme.php

Adds theme data to cache.

wp_load_alloptions()wp-includes/option.php

Loads and caches all autoloaded options, if available or all options.

get_option()wp-includes/option.php

Retrieves an option value based on an option name.

update_user_caches()wp-includes/user.php

Updates all user caches.

WP_Post::get_instance()wp-includes/class-wp-post.php

Retrieve WP_Post instance.

wp_mime_type_icon()wp-includes/post.php

Retrieves the icon for a MIME type or attachment.

get_all_page_ids()wp-includes/post.php

Gets a list of page IDs.

get_bookmark()wp-includes/bookmark.php

Retrieves bookmark data.

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Changelog

VersionDescription
2.0.0Introduced.

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