<?php

/**

 * Object Cache API

 *

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

 *

 * @package WordPress

 * @subpackage Cache

 */

/** WP_Object_Cache class */

require_once ABSPATH . WPINC . '/class-wp-object-cache.php';

/**

 * 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 data to the cache, if the cache key doesn't already exist.

 *

 * @since 2.0.0

 *

 * @see WP_Object_Cache::add()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

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

 * @param mixed      $data   The data to add to the cache.

 * @param string     $group  Optional. The group to add the cache to. Enables the same key

 *                           to be used across groups. Default empty.

 * @param int        $expire Optional. 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.

 */

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

	global $wp_object_cache;

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

}

/**

 * 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.

 *

 * @since 2.0.0

 *

 * @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.

 *

 * @since 2.0.0

 *

 * @see WP_Object_Cache::set()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @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 ) {

	global $wp_object_cache;

	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()

 * @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 on failure.

 */

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

	global $wp_object_cache;

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

}

/**

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

 *

 * @since 2.0.0

 *

 * @see WP_Object_Cache::get()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param int|string $key   The key under which the cache contents are stored.

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

 * @param bool       $force Optional. Whether to force an update of the local cache

 *                          from the persistent cache. Default false.

 * @param bool       $found Optional. Whether the key was found in the cache (passed by reference).

 *                          Disambiguates a return of false, a storable value. Default null.

 * @return mixed|false The cache contents on success, false on failure to retrieve contents.

 */

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

	global $wp_object_cache;

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

}

/**

 * Retrieves multiple values from the cache in one call.

 *

 * @since 5.5.0

 *

 * @see WP_Object_Cache::get_multiple()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param array  $keys  Array of keys under which the cache contents are stored.

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

 * @param bool   $force Optional. Whether to force an update of the local cache

 *                      from the persistent cache. Default false.

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

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

 */

function wp_cache_get_multiple( $keys, $group = '', $force = false ) {

	global $wp_object_cache;

	return $wp_object_cache->get_multiple( $keys, $group, $force );

}

/**

 * 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.

 *

 * @since 3.3.0

 *

 * @see WP_Object_Cache::incr()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

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

 * @param int        $offset Optional. The amount by which to increment 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_incr( $key, $offset = 1, $group = '' ) {

	global $wp_object_cache;

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

}

/**

 * Decrements numeric cache item's value.

 *

 * @since 3.3.0

 *

 * @see WP_Object_Cache::decr()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @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 = '' ) {

	global $wp_object_cache;

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

}

/**

 * Removes all cache items.

 *

 * @since 2.0.0

 *

 * @see WP_Object_Cache::flush()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

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

 */

function wp_cache_flush() {

	global $wp_object_cache;

	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();

}

/**

 * Removes all cache items in a group, if the object cache implementation supports it.

 *

 * Before calling this function, always check for group flushing support using the

 * `wp_cache_supports( 'flush_group' )` function.

 *

 * @since 6.1.0

 *

 * @see WP_Object_Cache::flush_group()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param string $group Name of group to remove from cache.

 * @return bool True if group was flushed, false otherwise.

 */

function wp_cache_flush_group( $group ) {

	global $wp_object_cache;

	return $wp_object_cache->flush_group( $group );

}

/**

 * Determines whether the object cache implementation supports a particular feature.

 *

 * @since 6.1.0

 *

 * @param string $feature Name of the feature to check for. Possible values include:

 *                        'add_multiple', 'set_multiple', 'get_multiple', 'delete_multiple',

 *                        'flush_runtime', 'flush_group'.

 * @return bool True if the feature is supported, false otherwise.

 */

function wp_cache_supports( $feature ) {

	switch ( $feature ) {

		case 'add_multiple':

		case 'set_multiple':

		case 'get_multiple':

		case 'delete_multiple':

		case 'flush_runtime':

		case 'flush_group':

			return true;

		default:

			return false;

	}

}

/**

 * 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;

}

/**

 * Adds a group or set of groups to the list of global groups.

 *

 * @since 2.6.0

 *

 * @see WP_Object_Cache::add_global_groups()

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 *

 * @param string|string[] $groups A group or an array of groups to add.

 */

function wp_cache_add_global_groups( $groups ) {

	global $wp_object_cache;

	$wp_object_cache->add_global_groups( $groups );

}

/**

 * Adds a group or set of groups to the list of non-persistent groups.

 *

 * @since 2.6.0

 *

 * @param string|string[] $groups A group or an array of groups to add.

 */

function wp_cache_add_non_persistent_groups( $groups ) {

	// Default cache doesn't persist so nothing to do here.

}

/**

 * 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.

 *

 * If the cache back end uses global blog or site IDs as part of its cache keys,

 * this function instructs the back end to reset those keys and perform any cleanup

 * since blog or site IDs have changed since cache init.

 *

 * This function is deprecated. Use wp_cache_switch_to_blog() instead of this

 * function when preparing the cache for a blog switch. For clearing the cache

 * during unit tests, consider using wp_cache_init(). wp_cache_init() is not

 * 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()

 * @see WP_Object_Cache::reset()

 *

 * @global WP_Object_Cache $wp_object_cache Object cache global instance.

 */

function wp_cache_reset() {

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

	global $wp_object_cache;

	$wp_object_cache->reset();

}