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<?php
/**
* LiteSpeed Object Cache Library
*
* @since 1.8
* @package LiteSpeed
*/
defined( 'WPINC' ) || exit();
if (!function_exists('litespeed_exception_handler')) {
/**
* Handle exception
*
* Converts PHP errors into exceptions for better error handling.
*
* @since 1.8
* @access public
* @param int $errno Error level.
* @param string $errstr Error message.
* @param string $errfile File where the error occurred.
* @param int $errline Line number where the error occurred.
* @throws \ErrorException Error msg.
*/
function litespeed_exception_handler( $errno, $errstr, $errfile, $errline ) {
throw new \ErrorException( esc_html( $errstr ), 0, esc_html( $errno ), esc_html( $errfile ), esc_html( $errline ) );
}
}
require_once __DIR__ . '/object-cache.cls.php';
require_once __DIR__ . '/object-cache-wp.cls.php';
/**
* Sets up Object Cache Global and assigns it.
*
* Initializes the global object cache instance.
*
* @since 1.8
* @access public
* @global WP_Object_Cache $wp_object_cache Object cache global instance.
*/
function wp_cache_init() {
// phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited
$GLOBALS['wp_object_cache'] = WP_Object_Cache::get_instance();
// If OC backend is unavailable, tell WP so transients fall back to wp_options.
// IMPORTANT: Cannot call wp_using_ext_object_cache(false) here directly — on
// multisite, wp_start_object_cache() is called a second time (ms-settings.php)
// and would try to load cache.php, causing "Cannot redeclare wp_cache_init()".
// Defer until after all wp_start_object_cache() calls are done.
if ( defined( 'LITESPEED_OC_FAILURE' ) ) {
add_action(
'muplugins_loaded',
function () {
wp_using_ext_object_cache( false );
},
-999
);
}
}
/**
* Adds data to the cache, if the cache key doesn't already exist.
*
* @since 1.8
* @access public
* @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 5.4
* @access public
* @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 1.8
* @access public
* @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 1.8
* @access public
* @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 5.4
* @access public
* @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 1.8
* @access public
* @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 5.4
* @access public
* @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 1.8
* @access public
* @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 5.4
* @access public
* @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 1.8
* @access public
* @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 1.8
* @access public
* @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 1.8
* @access public
* @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 5.4
* @access public
* @see WP_Object_Cache::flush_runtime()
*
* @return bool True on success, false on failure.
*/
function wp_cache_flush_runtime() {
global $wp_object_cache;
return $wp_object_cache->flush_runtime();
}
/**
* 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 5.4
* @access public
* @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 5.4
* @access public
*
* @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':
return true;
case 'flush_group':
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 1.8
* @access public
*
* @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 1.8
* @access public
* @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 1.8
* @access public
*
* @param string|string[] $groups A group or an array of groups to add.
*/
function wp_cache_add_non_persistent_groups( $groups ) {
global $wp_object_cache;
$wp_object_cache->add_non_persistent_groups( $groups );
}
/**
* Switches the internal blog ID.
*
* This changes the blog id used to create keys in blog specific groups.
*
* @since 1.8
* @access public
* @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 );
}