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wordpress-azure/wp-includes/cache.php at master · TeodoroJr1968/wordpress-azure · GitHub
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<?php
/**
* Object Cache API
*
* @link https://codex.wordpress.org/Class_Reference/WP_Object_Cache
*
* @package WordPress
* @subpackage Cache
*/
/** WP_Object_Cache class */
require_once
ABSPATH
.
WPINC
.
'
/class-wp-object-cache.php
'
;
/**
* 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
);
}
/**
* 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
;
}
/**
* 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 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
);
}
/**
* 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
();
}
/**
* 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 values organized into groups.
*/
function
wp_cache_get_multiple
(
$
keys
,
$
group
=
''
,
$
force
=
false
) {
global
$
wp_object_cache
;
return
$
wp_object_cache
->
get_multiple
(
$
keys
,
$
group
,
$
force
);
}
/**
* Increment 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
);
}
/**
* 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
();
}
/**
* 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 False if original value does not exist, true if contents were replaced
*/
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
);
}
/**
* 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
);
}
/**
* 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.
}
/**
* Reset 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 2.6.0
* @deprecated 3.5.0 WP_Object_Cache::reset()
* @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_Object_Cache::reset()
'
);
global
$
wp_object_cache
;
$
wp_object_cache
->
reset
();
}
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