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

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

 * @param string $group The group to add the cache to

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

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

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

 * Decrement numeric cache item's value

 *

 * @since 3.3.0

 * @uses $wp_object_cache Object Cache Class

 * @see WP_Object_Cache::decr()

 *

 * @param int|string $key The cache key to increment

 * @param int $offset The amount by which to decrement the item's value. Default is 1.

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

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

 */

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

	global $wp_object_cache;

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

}

/**

 * Removes the cache contents matching key and group.

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

 * @param string $group Where the cache contents are grouped

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

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

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

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

 * @param string $group Where the cache contents are grouped

 * @param bool $force Whether to force an update of the local cache from the persistent cache (default is false)

 * @param &bool $found Whether key was found in the cache. Disambiguates a return of false, a storable value.

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

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

}

/**

 * Increment numeric cache item's value

 *

 * @since 3.3.0

 * @uses $wp_object_cache Object Cache Class

 * @see WP_Object_Cache::incr()

 *

 * @param int|string $key The cache key to increment

 * @param int $offset The amount by which to increment the item's value. Default is 1.

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

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

 */

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

	global $wp_object_cache;

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

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

 * @param int|string $key What to call the contents in the cache

 * @param string $group Where to group the cache contents

 * @return bool False if cache key and group already exist, true on success

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

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

 * @param int|string $key What to call the contents in the cache

 * @param string $group Where to group the cache contents

 * @return bool False if cache key and group already exist, true on success

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

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

	global $wp_object_cache;

	return $wp_object_cache->add_global_groups($groups);

 * Reset internal cache keys and structures. If the cache backend uses global blog or site IDs as part of its cache keys,

 * this function instructs the backend to reset those keys and perform any cleanup since blog or site IDs have changed since cache init.

 *

 * @since 2.6.0

 */

function wp_cache_reset() {

	global $wp_object_cache;

	return $wp_object_cache->reset();

}

/**

	 * List of global groups

	 *

	 * @var array

	 * @access protected

	 * @since 3.0.0

	 */

	var $global_groups = array();

	/**

	 * @uses WP_Object_Cache::_exists Checks to see if the cache already has data.

	 *		contents existence.

	 * @param int|string $key What to call the contents in the cache

	 * @return bool False if cache key and group already exist, true on success

	function add( $key, $data, $group = 'default', $expire = '' ) {

		if ( wp_suspend_cache_addition() )

			return false;

		if ( empty( $group ) )

		if ( $this->_exists($key, $group) )

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

	 * Sets the list of global groups.

	 *

	 * @since 3.0.0

	 *

	 * @param array $groups List of groups that are global.

	 */

	function add_global_groups( $groups ) {

		$groups = (array) $groups;

		$this->global_groups = array_merge($this->global_groups, $groups);

		$this->global_groups = array_unique($this->global_groups);

	}

	/**

	 * Decrement numeric cache item's value

	 *

	 * @since 3.3.0

	 * @param int|string $key The cache key to increment

	 * @param int $offset The amount by which to decrement the item's value. Default is 1.

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

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

	 */

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

		if ( ! $this->_exists( $key, $group ) )

			return false;

		if ( ! is_numeric( $this->cache[ $group ][ $key ] ) )

			$this->cache[ $group ][ $key ] = 0;

		$offset = (int) $offset;

		$this->cache[ $group ][ $key ] -= $offset;

		if ( $this->cache[ $group ][ $key ] < 0 )

			$this->cache[ $group ][ $key ] = 0;

		return $this->cache[ $group ][ $key ];

	}

	/**

	 * Remove the contents of the cache key in the group

	 *

	 * If the cache key does not exist in the group and $force parameter is set

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

	 *		key in the group

	function delete($key, $group = 'default', $force = false) {

		if ( empty( $group ) )

		if ( ! $force && ! $this->_exists( $key, $group ) )

		unset( $this->cache[$group][$key] );

	 * key in the cache group. If the cache is hit (success) then the contents

	 * On failure, the number of cache misses will be incremented.

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

	 * @param string $force Whether to force a refetch rather than relying on the local cache (default is false)

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

		if ( empty( $group ) )

		if ( $this->_exists( $key, $group ) ) {

			$found = true;

			if ( is_object($this->cache[$group][$key]) )

				return clone $this->cache[$group][$key];

				return $this->cache[$group][$key];

		$found = false;

		$this->cache_misses += 1;

		return false;

	}

	/**

	 * Increment numeric cache item's value

	 *

	 * @since 3.3.0

	 *

	 * @param int|string $key The cache key to increment

	 * @param int $offset The amount by which to increment the item's value. Default is 1.

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

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

	 */

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

		if ( empty( $group ) )

			$group = 'default';

		if ( ! $this->_exists( $key, $group ) )

		if ( ! is_numeric( $this->cache[ $group ][ $key ] ) )

			$this->cache[ $group ][ $key ] = 0;

		$offset = (int) $offset;

		$this->cache[ $group ][ $key ] += $offset;