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wp_cache_get_last_changed( string $group ): string

Gets last changed date for the specified cache group.

Parameters

$group string Required
Where the cache contents are grouped.

Return

string UNIX timestamp with microseconds representing when the group was last changed.

Source

File: wp-includes/functions.php. View all references

function wp_cache_get_last_changed( $group ) {
	$last_changed = wp_cache_get( 'last_changed', $group );

	if ( ! $last_changed ) {
		$last_changed = microtime();
		wp_cache_set( 'last_changed', $last_changed, $group );
	}

	return $last_changed;
}

Uses

Uses Description
wp_cache_set() wp-includes/cache.php

Saves the data to the cache.
wp_cache_get() wp-includes/cache.php

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

Used By

Used By Description
WP_Query::generate_cache_key() wp-includes/class-wp-query.php

Generate cache key.
_find_post_by_old_slug() wp-includes/query.php

Find the post ID for redirecting an old slug.
_find_post_by_old_date() wp-includes/query.php

Find the post ID for redirecting an old date.
WP_Term_Query::get_terms() wp-includes/class-wp-term-query.php

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

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

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

Fetch descendants for located comments.
WP_Comment_Query::get_comments() wp-includes/class-wp-comment-query.php

Get a list of comments matching the query vars.
wp_get_archives() wp-includes/general-template.php

Displays archive links based on type and format.
WP_Query::get_posts() wp-includes/class-wp-query.php

Retrieves an array of posts based on query variables.
get_objects_in_term() wp-includes/taxonomy.php

Retrieves object IDs of valid taxonomy and term.
get_page_by_path() wp-includes/post.php

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

Retrieves an array of pages (or hierarchical post type items).

Changelog

Version Description
4.7.0 Introduced.

© 2003–2022 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_cache_get_last_changed