<?php

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/**

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* Object Cache API functions missing from 3rd party object caches.

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*

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

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*

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* @package WordPress

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* @subpackage Cache

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*/

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if ( ! function_exists( 'wp_cache_add_multiple' ) ) :

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/**

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* Adds multiple values to the cache in one call, if the cache keys don't already exist.

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*

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* Compat function to mimic wp_cache_add_multiple().

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*

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* @ignore

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* @since 6.0.0

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*

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* @see wp_cache_add_multiple()

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*

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

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

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

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* Default 0 (no expiration).

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

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

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*/

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

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$values = array();

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foreach ( $data as $key => $value ) {

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$values[ $key ] = wp_cache_add( $key, $value, $group, $expire );

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}

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return $values;

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}

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endif;

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if ( ! function_exists( 'wp_cache_set_multiple' ) ) :

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/**

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* Sets multiple values to the cache in one call.

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*

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* Differs from wp_cache_add_multiple() in that it will always write data.

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*

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* Compat function to mimic wp_cache_set_multiple().

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*

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* @ignore

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* @since 6.0.0

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*

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* @see wp_cache_set_multiple()

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*

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

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

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

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* Default 0 (no expiration).

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

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* true on success, or false on failure.

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*/

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

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$values = array();

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foreach ( $data as $key => $value ) {

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$values[ $key ] = wp_cache_set( $key, $value, $group, $expire );

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}

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return $values;

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}

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endif;

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if ( ! function_exists( 'wp_cache_get_multiple' ) ) :

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/**

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* Retrieves multiple values from the cache in one call.

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*

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* Compat function to mimic wp_cache_get_multiple().

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*

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* @ignore

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* @since 5.5.0

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*

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* @see wp_cache_get_multiple()

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*

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

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

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

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* from the persistent cache. Default false.

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

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

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*/

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

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$values = array();

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foreach ( $keys as $key ) {

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$values[ $key ] = wp_cache_get( $key, $group, $force );

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}

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return $values;

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}

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endif;

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if ( ! function_exists( 'wp_cache_delete_multiple' ) ) :

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/**

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* Deletes multiple values from the cache in one call.

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*

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* Compat function to mimic wp_cache_delete_multiple().

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*

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* @ignore

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* @since 6.0.0

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*

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* @see wp_cache_delete_multiple()

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*

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

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

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

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

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*/

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

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$values = array();

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foreach ( $keys as $key ) {

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$values[ $key ] = wp_cache_delete( $key, $group );

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}

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return $values;

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}

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endif;

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if ( ! function_exists( 'wp_cache_flush_runtime' ) ) :

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/**

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

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*

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* Compat function to mimic wp_cache_flush_runtime().

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*

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* @ignore

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* @since 6.0.0

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*

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* @see wp_cache_flush_runtime()

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*

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

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*/

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function wp_cache_flush_runtime() {

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if ( ! wp_cache_supports( 'flush_runtime' ) ) {

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_doing_it_wrong(

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__FUNCTION__,

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__( 'Your object cache implementation does not support flushing the in-memory runtime cache.' ),

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'6.1.0'

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);

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return false;

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}

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return wp_cache_flush();

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}

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endif;

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if ( ! function_exists( 'wp_cache_flush_group' ) ) :

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/**

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

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*

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

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* `wp_cache_supports( 'flush_group' )` function.

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*

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* @since 6.1.0

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*

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* @see WP_Object_Cache::flush_group()

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* @global WP_Object_Cache $wp_object_cache Object cache global instance.

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*

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

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

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*/

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function wp_cache_flush_group( $group ) {

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global $wp_object_cache;

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if ( ! wp_cache_supports( 'flush_group' ) ) {

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_doing_it_wrong(

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__FUNCTION__,

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__( 'Your object cache implementation does not support flushing individual groups.' ),

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'6.1.0'

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);

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return false;

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}

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return $wp_object_cache->flush_group( $group );

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}

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endif;

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if ( ! function_exists( 'wp_cache_supports' ) ) :

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/**

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

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*

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* @since 6.1.0

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*

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

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

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* 'flush_runtime', 'flush_group'.

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

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*/

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function wp_cache_supports( $feature ) {

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return false;

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}

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endif;

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