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

Saves the data to the cache.

Contents

Description Description

Differs from wp_cache_add() and wp_cache_replace() in that it will always write data.

See also See also

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Parameters Parameters

$key

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

$data

(mixed) (Required) The contents to store in the cache.

$group

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

Default value: ''

$expire

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

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Return Return

(bool) False on failure, true on success

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Source Source

File: wp-includes/cache.php 

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

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

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Changelog Changelog

Changelog
Version Description
2.0.0 Introduced.

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Used By Used By

Used By
Used By Description
wp-includes/ms-site.php: wp_cache_set_sites_last_changed()

Sets the last changed time for the ‘sites’ cache group.
wp-includes/taxonomy.php: wp_cache_set_terms_last_changed()

Sets the last changed time for the ‘terms’ cache group.
wp-includes/comment.php: wp_cache_set_comments_last_changed()

Sets the last changed time for the ‘comment’ cache group.
wp-includes/post.php: wp_cache_set_posts_last_changed()

Sets the last changed time for the ‘posts’ cache group.
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-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()

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

Get terms, based on query_vars.
wp-includes/ms-network.php: clean_network_cache()

Removes a network from the object cache.
wp-includes/class-wp-site.php: WP_Site::get_details()

Retrieves the details for this site.
wp-includes/class-wp-comment-query.php: WP_Comment_Query::fill_descendants()

Fetch descendants for located comments.
wp-includes/option.php: update_network_option()

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

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

Retrieve 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-admin/includes/plugin.php: get_plugins()

Check the plugins directory and retrieve all plugin files with plugin data.
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/functions.php: is_blog_installed()

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

Determine if the given object is associated with any of the given terms.
wp-includes/taxonomy.php: clean_term_cache()

Will remove all of the term ids from the cache.
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: set_site_transient()

Set/update the value of a site transient.
wp-includes/option.php: set_transient()

Set/update the value of a transient.
wp-includes/option.php: wp_load_core_site_options()

Loads and caches certain often requested site options if is_multisite() and a persistent cache is not being used.
wp-includes/option.php: update_option()

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

Add a new option.
wp-includes/option.php: delete_option()

Removes option by name. Prevents removal of protected WordPress options.
wp-includes/option.php: get_option()

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

Will clean the post in the cache.
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_page_by_path()

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

Retrieve a list 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: wpmu_create_blog()

Create a site.
wp-includes/ms-functions.php: get_blog_id_from_url()

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

Retrieves the list of bookmarks
wp-includes/ms-site.php: clean_blog_cache()

Clean the blog cache
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: clean_comment_cache()

Removes a comment from the object cache.
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.
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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: 0You 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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