* @link https://developer.wordpress.org/reference/classes/wp_object_cache/

 * Sets up Object Cache Global and assigns it.

 *

 * @since 2.0.0

 *

 * @global WP_Object_Cache $wp_object_cache

 */

function wp_cache_init() {

	$GLOBALS['wp_object_cache'] = new WP_Object_Cache();

}

/**

 * Adds multiple values to the cache in one call.

 *

 * @since 6.0.0

 *

 * @see WP_Object_Cache::add_multiple()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 * @param array  $data   Array of keys and values to be set.

 * @param string $group  Optional. Where the cache contents are grouped. Default empty.

 * @param int    $expire Optional. When to expire the cache contents, in seconds.

 *                       Default 0 (no expiration).

 * @return bool[] Array of return values, grouped by key. Each value is either

 *                true on success, or false if cache key and group already exist.

 */

function wp_cache_add_multiple( array $data, $group = '', $expire = 0 ) {

	global $wp_object_cache;

	return $wp_object_cache->add_multiple( $data, $group, $expire );

}

/**

 * Replaces the contents of the cache with new data.

 * @see WP_Object_Cache::replace()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param int|string $key    The key for the cache data that should be replaced.

 * @param mixed      $data   The new data to store in the cache.

 * @param string     $group  Optional. The group for the cache data that should be replaced.

 *                           Default empty.

 * @param int        $expire Optional. When to expire the cache contents, in seconds.

 *                           Default 0 (no expiration).

 * @return bool True if contents were replaced, false if original value does not exist.

function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) {

	global $wp_object_cache;

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

 * Saves the data to the cache.

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

 * @see WP_Object_Cache::set()

 * @param int|string $key    The cache key to use for retrieval later.

 * @param mixed      $data   The contents to store in the cache.

 * @param string     $group  Optional. Where to group the cache contents. Enables the same key

 *                           to be used across groups. Default empty.

 * @param int        $expire Optional. When to expire the cache contents, in seconds.

 *                           Default 0 (no expiration).

 * @return bool True on success, false on failure.

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

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

 * Sets multiple values to the cache in one call.

 * @since 6.0.0

 * @see WP_Object_Cache::set_multiple()

 * @param array  $data   Array of keys and values to be set.

 * @param string $group  Optional. Where the cache contents are grouped. Default empty.

 * @param int    $expire Optional. When to expire the cache contents, in seconds.

 *                       Default 0 (no expiration).

 * @return bool[] Array of return values, grouped by key. Each value is either

 *                true on success, or false on failure.

function wp_cache_set_multiple( array $data, $group = '', $expire = 0 ) {

	return $wp_object_cache->set_multiple( $data, $group, $expire );

 * @return array Array of return values, grouped by key. Each value is either

 *               the cache contents on success, or false on failure.

 * Removes the cache contents matching key and group.

 *

 * @since 2.0.0

 *

 * @see WP_Object_Cache::delete()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param int|string $key   What the contents in the cache are called.

 * @param string     $group Optional. Where the cache contents are grouped. Default empty.

 * @return bool True on successful removal, false on failure.

 */

function wp_cache_delete( $key, $group = '' ) {

	global $wp_object_cache;

	return $wp_object_cache->delete( $key, $group );

}

/**

 * Deletes multiple values from the cache in one call.

 *

 * @since 6.0.0

 *

 * @see WP_Object_Cache::delete_multiple()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param array  $keys  Array of keys under which the cache to deleted.

 * @param string $group Optional. Where the cache contents are grouped. Default empty.

 * @return bool[] Array of return values, grouped by key. Each value is either

 *                true on success, or false if the contents were not deleted.

 */

function wp_cache_delete_multiple( array $keys, $group = '' ) {

	global $wp_object_cache;

	return $wp_object_cache->delete_multiple( $keys, $group );

}

/**

 * Increments numeric cache item's value.

 * @param int        $offset Optional. The amount by which to increment the item's value.

 *                           Default 1.

 * Decrements numeric cache item's value.

 * @since 3.3.0

 * @see WP_Object_Cache::decr()

 * @param int|string $key    The cache key to decrement.

 * @param int        $offset Optional. The amount by which to decrement the item's value.

 *                           Default 1.

 * @param string     $group  Optional. The group the key is in. Default empty.

 * @return int|false The item's new value on success, false on failure.

function wp_cache_decr( $key, $offset = 1, $group = '' ) {

	return $wp_object_cache->decr( $key, $offset, $group );

 * Removes all cache items.

 * @see WP_Object_Cache::flush()

function wp_cache_flush() {

	return $wp_object_cache->flush();

 * Removes all cache items from the in-memory runtime cache.

 * @since 6.0.0

 * @see WP_Object_Cache::flush()

 * @return bool True on success, false on failure.

function wp_cache_flush_runtime() {

	return wp_cache_flush();

}

/**

 * Closes the cache.

 *

 * This function has ceased to do anything since WordPress 2.5. The

 * functionality was removed along with the rest of the persistent cache.

 *

 * This does not mean that plugins can't implement this function when they need

 * to make sure that the cache is cleaned up after WordPress no longer needs it.

 *

 * @since 2.0.0

 *

 * @return true Always returns true.

 */

function wp_cache_close() {

	return true;

 * Switches the internal blog ID.

 *

 * This changes the blog id used to create keys in blog specific groups.

 *

 * @since 3.5.0

 *

 * @see WP_Object_Cache::switch_to_blog()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param int $blog_id Site ID.

 */

function wp_cache_switch_to_blog( $blog_id ) {

	global $wp_object_cache;

	$wp_object_cache->switch_to_blog( $blog_id );

}

/**

 * Resets internal cache keys and structures.

 * recommended outside of unit tests as the performance penalty for using it is high.

 * @since 3.0.0

 * @deprecated 3.5.0 Use wp_cache_switch_to_blog()

	_deprecated_function( __FUNCTION__, '3.5.0', 'wp_cache_switch_to_blog()' );