wp_cache_get( int|string $key, string $group = '', bool $force = false, bool $found = null )

Retrieves the cache contents from the cache by key and group.

Contents

Description Description

See also See also

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Parameters Parameters

$key

(int|string) (Required) The key under which the cache contents are stored.

$group

(string) (Optional) Where the cache contents are grouped.

Default value: ''

$force

(bool) (Optional) Whether to force an update of the local cache from the persistent cache.

Default value: false

$found

(bool) (Optional) Whether the key was found in the cache (passed by reference). Disambiguates a return of false, a storable value.

Default value: null

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Return Return

(mixed|false) The cache contents on success, false on failure to retrieve contents.

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Source Source

File: wp-includes/cache.php 

function wp_cache_get( $key, $group = '', $force = false, &$found = null ) {
	global $wp_object_cache;

	return $wp_object_cache->get( $key, $group, $force, $found );
}

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Used By Used By

Used By
Used By Description
wp-includes/meta.php: get_metadata_raw()

Retrieves raw metadata value for the specified object.
wp-admin/includes/class-wp-privacy-requests-table.php: WP_Privacy_Requests_Table::get_request_counts()

Count number of requests for each status.
wp-includes/class-wp-network.php: WP_Network::get_main_site_id()

Returns the main site ID for the network.
wp-includes/class-wp-embed.php: WP_Embed::find_oembed_post_id()

Find the oEmbed cache post ID for a given cache key.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::find_changeset_post_id()

Find the changeset post ID for a given changeset UUID.
wp-includes/functions.php: wp_cache_get_last_changed()

Gets last changed date for the specified cache group.
wp-includes/class-wp-term-query.php: WP_Term_Query::get_terms()

Retrieves the query results.
wp-includes/class-wp-network-query.php: WP_Network_Query::get_networks()

Gets a list of networks matching the query vars.
wp-includes/class-wp-site.php: WP_Site::get_details()

Retrieves the details for this site.
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-query.php: WP_Site_Query::get_sites()

Retrieves a list of sites matching the query vars.
wp-includes/class-wp-site.php: WP_Site::get_instance()

Retrieves a site from the database by its ID.
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_by_path()

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

Retrieves a WP_Comment instance.
wp-includes/class-wp-comment-query.php: WP_Comment_Query::fill_descendants()

Fetch descendants for located comments.
wp-includes/class-wp-term.php: WP_Term::get_instance()

Retrieve WP_Term instance.
wp-includes/option.php: update_network_option()

Updates the value of a network option that was already added.
wp-includes/option.php: add_network_option()

Adds a new network option.
wp-includes/option.php: get_network_option()

Retrieves a network’s option value based on the option name.
wp-admin/includes/class-wp-ms-sites-list-table.php: WP_MS_Sites_List_Table::column_users()

Handles the users column output.
wp-includes/class-wp-comment-query.php: WP_Comment_Query::get_comments()

Get a list of comments matching the query vars.
wp-admin/includes/plugin.php: get_plugins()

Check the plugins directory and retrieve all plugin files with plugin data.
wp-includes/class-wp-user.php: WP_User::get_data_by()

Return only the main user fields
wp-includes/general-template.php: wp_get_archives()

Display archive links based on type and format.
wp-includes/general-template.php: get_calendar()

Display calendar with days that have posts as links.
wp-includes/deprecated.php: get_usermeta()

Retrieve user metadata.
wp-includes/class-wp-theme.php: WP_Theme::cache_get()

Gets theme data from cache.
wp-includes/functions.php: is_blog_installed()

Determines whether WordPress is already installed.
wp-includes/taxonomy.php: get_object_term_cache()

Retrieves the cached term objects for the given object ID.
wp-includes/taxonomy.php: get_objects_in_term()

Retrieve object_ids of valid taxonomy and term.
wp-includes/link-template.php: get_adjacent_post()

Retrieves the adjacent post.
wp-includes/option.php: get_site_transient()

Retrieves the value of a site transient.
wp-includes/option.php: get_transient()

Retrieves the value of a transient.
wp-includes/option.php: wp_load_alloptions()

Loads and caches all autoloaded options, if available or all options.
wp-includes/option.php: update_option()

Updates the value of an option that was already added.
wp-includes/option.php: add_option()

Adds a new option.
wp-includes/option.php: get_option()

Retrieves an option value based on an option name.
wp-includes/class-wp-post.php: WP_Post::get_instance()

Retrieve WP_Post instance.
wp-includes/post.php: wp_mime_type_icon()

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

Gets the timestamp of the last time any post was modified or published.
wp-includes/post.php: get_all_page_ids()

Get a list of page IDs.
wp-includes/post.php: get_page_by_path()

Retrieves a page given its path.
wp-includes/post.php: get_pages()

Retrieve an array of pages (or hierarchical post type items).
wp-includes/post.php: wp_count_posts()

Count number of posts of a post type and if user has permissions to view.
wp-includes/ms-functions.php: get_blog_id_from_url()

Get a blog’s numeric ID from its URL.
wp-includes/bookmark.php: get_bookmark()

Retrieve Bookmark data
wp-includes/bookmark.php: get_bookmarks()

Retrieves the list of bookmarks
wp-includes/ms-blogs.php: get_blog_details()

Retrieve the details for a blog from the blogs table and blog options.
wp-includes/comment.php: wp_count_comments()

Retrieves the total comment counts for the whole site or a single post.
wp-includes/comment.php: get_lastcommentmodified()

The date the last comment was modified.
wp-includes/meta.php: metadata_exists()

Determines if a meta field with the given key exists for the given object ID.
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Changelog Changelog

Changelog
Version Description
2.0.0 Introduced.

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User Contributed Notes User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 1You must log in to vote on the helpfulness of this note
    Contributed by Mayeenul Islam — 
    function prefix_get_post_count( $post_status = 'publish' ) {
    $cache_key = 'prefix_post_count_'. $post_status;
    $_posts = wp_cache_get( $cache_key );
    if ( false === $_posts ) {
        $_posts = $wpdb->get_var(
                    $wpdb->prepare(
                        "SELECT COUNT(*) FROM $wpdb->posts WHERE post_type = 'post' AND post_status = %s",
                        $post_status
                    ));
 
        wp_cache_set( $cache_key, $_posts );
    }
 
    return $_posts;
}

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  2. Skip to note 2 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 1You must log in to vote on the helpfulness of this note
    Contributed by Aamer Shahzad — 
    /**
 * Handles the users column output.
 *
 * @since 4.3.0
 *
 * @param array $blog Current site.
 */
public function column_users( $blog ) {
    $user_count = wp_cache_get( $blog['blog_id'] . '_user_count', 'blog-details' );
    if ( ! $user_count ) {
        $blog_users = new WP_User_Query(
            array(
                'blog_id'     => $blog['blog_id'],
                'fields'      => 'ID',
                'number'      => 1,
                'count_total' => true,
            )
        );
        $user_count = $blog_users->get_total();
        wp_cache_set( $blog['blog_id'] . '_user_count', $user_count, 'blog-details', 12 * HOUR_IN_SECONDS );
    }

    printf(
        '<a href="%s">%s</a>',
        esc_url( network_admin_url( 'site-users.php?id=' . $blog['blog_id'] ) ),
        number_format_i18n( $user_count )
    );
}

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