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<?php
/**
* WP Object Cache wrapper for LiteSpeed Cache.
*
* Provides a drop-in-compatible object cache implementation that proxies to
* LiteSpeed's persistent cache while keeping a local runtime cache.
*
* @package LiteSpeed
* @since 1.8
*/
/**
* Class WP_Object_Cache
*
* Implements the WordPress object cache for LiteSpeed Cache.
*
* @since 1.8
* @package LiteSpeed
*/
class WP_Object_Cache {
/**
* Singleton instance
*
* @since 1.8
* @access protected
* @var WP_Object_Cache|null
*/
protected static $_instance;
/**
* Object cache instance
*
* @since 1.8
* @access private
* @var \LiteSpeed\Object_Cache
*/
private $_object_cache;
/**
* Cache storage
*
* @since 1.8
* @access private
* @var array
*/
private $_cache = array();
/**
* Cache for 404 keys
*
* @since 1.8
* @access private
* @var array
*/
private $_cache_404 = array();
/**
* Total cache operations
*
* @since 1.8
* @access private
* @var int
*/
private $cache_total = 0;
/**
* Cache hits within call
*
* @since 1.8
* @access private
* @var int
*/
private $count_hit_incall = 0;
/**
* Cache hits
*
* @since 1.8
* @access private
* @var int
*/
private $count_hit = 0;
/**
* Cache misses within call
*
* @since 1.8
* @access private
* @var int
*/
private $count_miss_incall = 0;
/**
* Cache misses
*
* @since 1.8
* @access private
* @var int
*/
private $count_miss = 0;
/**
* Cache set operations
*
* @since 1.8
* @access private
* @var int
*/
private $count_set = 0;
/**
* Global cache groups
*
* @since 1.8
* @access protected
* @var array
*/
protected $global_groups = array();
/**
* Blog prefix for cache keys
*
* @since 1.8
* @access private
* @var string
*/
private $blog_prefix;
/**
* Multisite flag
*
* @since 1.8
* @access private
* @var bool
*/
private $multisite;
/**
* Init.
*
* Initializes the object cache with LiteSpeed settings.
*
* @since 1.8
* @access public
*/
public function __construct() {
$this->_object_cache = \LiteSpeed\Object_Cache::cls();
$this->multisite = is_multisite();
$this->blog_prefix = $this->multisite ? get_current_blog_id() . ':' : '';
/**
* Fix multiple instance using same oc issue
*
* @since 1.8.2
*/
if ( ! defined( 'LSOC_PREFIX' ) ) {
define( 'LSOC_PREFIX', substr( md5( __FILE__ ), -5 ) );
}
}
/**
* Makes private properties readable for backward compatibility.
*
* @since 5.4
* @access public
*
* @param string $name Property to get.
* @return mixed Property.
*/
public function __get( $name ) {
return $this->$name;
}
/**
* Makes private properties settable for backward compatibility.
*
* @since 5.4
* @access public
*
* @param string $name Property to set.
* @param mixed $value Property value.
* @return mixed Newly-set property.
*/
public function __set( $name, $value ) {
$this->$name = $value;
return $this->$name;
}
/**
* Makes private properties checkable for backward compatibility.
*
* @since 5.4
* @access public
*
* @param string $name Property to check if set.
* @return bool Whether the property is set.
*/
public function __isset( $name ) {
return isset( $this->$name );
}
/**
* Makes private properties un-settable for backward compatibility.
*
* @since 5.4
* @access public
*
* @param string $name Property to unset.
*/
public function __unset( $name ) {
unset( $this->$name );
}
/**
* Serves as a utility function to determine whether a key is valid.
*
* @since 5.4
* @access protected
*
* @param int|string $key Cache key to check for validity.
* @return bool Whether the key is valid.
*/
protected function is_valid_key( $key ) {
if ( is_int( $key ) ) {
return true;
}
if ( is_string( $key ) && '' !== trim( $key ) ) {
return true;
}
$type = gettype( $key );
if ( ! function_exists( '__' ) ) {
wp_load_translations_early();
}
$message = is_string( $key )
? __( 'Cache key must not be an empty string.' )
: sprintf(
/* translators: %s: The type of the given cache key. */
__( 'Cache key must be integer or non-empty string, %s given.' ),
$type
);
_doing_it_wrong(
esc_html( __METHOD__ ),
esc_html( $message ),
'6.1.0'
);
return false;
}
/**
* Get the final key.
*
* Generates a unique cache key based on group and prefix.
*
* @since 1.8
* @access private
* @param int|string $key Cache key.
* @param string $group Optional. Cache group. Default 'default'.
* @return string The final cache key.
*/
private function _key( $key, $group = 'default' ) {
if ( empty( $group ) ) {
$group = 'default';
}
$prefix = $this->_object_cache->is_global( $group ) ? '' : $this->blog_prefix;
return LSOC_PREFIX . $prefix . $group . '.' . $key;
}
/**
* Output debug info.
*
* Returns cache statistics for debugging purposes.
*
* @since 1.8
* @access public
* @return string Cache statistics.
*/
public function debug() {
return ' [total] ' .
$this->cache_total .
' [hit_incall] ' .
$this->count_hit_incall .
' [hit] ' .
$this->count_hit .
' [miss_incall] ' .
$this->count_miss_incall .
' [miss] ' .
$this->count_miss .
' [set] ' .
$this->count_set;
}
/**
* Adds data to the cache if it doesn't already exist.
*
* @since 1.8
* @access public
* @see WP_Object_Cache::set()
*
* @param int|string $key What to call the contents in the cache.
* @param mixed $data The contents to store in the cache.
* @param string $group Optional. Where to group the cache contents. Default 'default'.
* @param int $expire Optional. When to expire the cache contents, in seconds.
* Default 0 (no expiration).
* @return bool True on success, false if cache key and group already exist.
*/
public function add( $key, $data, $group = 'default', $expire = 0 ) {
if ( wp_suspend_cache_addition() ) {
return false;
}
if ( ! $this->is_valid_key( $key ) ) {
return false;
}
if ( empty( $group ) ) {
$group = 'default';
}
$id = $this->_key( $key, $group );
if ( array_key_exists( $id, $this->_cache ) ) {
return false;
}
return $this->set( $key, $data, $group, (int) $expire );
}
/**
* Adds multiple values to the cache in one call.
*
* @since 5.4
* @access public
*
* @param array $data Array of keys and values to be added.
* @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.
*/
public function add_multiple( array $data, $group = '', $expire = 0 ) {
$values = array();
foreach ( $data as $key => $value ) {
$values[ $key ] = $this->add( $key, $value, $group, $expire );
}
return $values;
}
/**
* Replaces the contents in the cache, if contents already exist.
*
* @since 1.8
* @access public
* @see WP_Object_Cache::set()
*
* @param int|string $key What to call the contents in the cache.
* @param mixed $data The contents to store in the cache.
* @param string $group Optional. Where to group the cache contents. Default 'default'.
* @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.
*/
public function replace( $key, $data, $group = 'default', $expire = 0 ) {
if ( ! $this->is_valid_key( $key ) ) {
return false;
}
if ( empty( $group ) ) {
$group = 'default';
}
$id = $this->_key( $key, $group );
if ( ! array_key_exists( $id, $this->_cache ) ) {
return false;
}
return $this->set( $key, $data, $group, (int) $expire );
}
/**
* Sets the data contents into the cache.
*
* The cache contents are grouped by the $group parameter followed by the
* $key. This allows for duplicate IDs in unique groups. Therefore, naming of
* the group should be used with care and should follow normal function
* naming guidelines outside of core WordPress usage.
*
* The $expire parameter is not used, because the cache will automatically
* expire for each time a page is accessed and PHP finishes. The method is
* more for cache plugins which use files.
*
* @since 1.8
* @since 5.4 Returns false if cache key is invalid.
* @access public
*
* @param int|string $key What to call the contents in the cache.
* @param mixed $data The contents to store in the cache.
* @param string $group Optional. Where to group the cache contents. Default 'default'.
* @param int $expire Optional. When to expire the cache contents, in seconds.
* Default 0 (no expiration).
* @return bool True if contents were set, false if key is invalid.
*/
public function set( $key, $data, $group = 'default', $expire = 0 ) {
if ( ! $this->is_valid_key( $key ) ) {
return false;
}
if ( empty( $group ) ) {
$group = 'default';
}
$id = $this->_key( $key, $group );
if ( is_object( $data ) ) {
$data = clone $data;
}
$this->_cache[ $id ] = $data;
if ( array_key_exists( $id, $this->_cache_404 ) ) {
unset( $this->_cache_404[ $id ] );
}
if ( ! $this->_object_cache->is_non_persistent( $group ) ) {
// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.serialize_serialize
$this->_object_cache->set( $id, serialize( array( 'data' => $data ) ), (int) $expire );
++$this->count_set;
}
if ( $this->_object_cache->store_transients( $group ) ) {
$this->_transient_set( $key, $data, $group, (int) $expire );
}
return true;
}
/**
* Sets multiple values to the cache in one call.
*
* @since 5.4
* @access public
*
* @param array $data Array of key and value 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 always true.
*/
public function set_multiple( array $data, $group = '', $expire = 0 ) {
$values = array();
foreach ( $data as $key => $value ) {
$values[ $key ] = $this->set( $key, $value, $group, $expire );
}
return $values;
}
/**
* Retrieves the cache contents, if it exists.
*
* The contents will be first attempted to be retrieved by searching by the
* key in the cache group. If the cache is hit (success) then the contents
* are returned.
*
* On failure, the number of cache misses will be incremented.
*
* @since 1.8
* @access public
*
* @param int|string $key The key under which the cache contents are stored.
* @param string $group Optional. Where the cache contents are grouped. Default 'default'.
* @param bool $force Optional. Unused. 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.
*/
public function get( $key, $group = 'default', $force = false, &$found = null ) {
if ( ! $this->is_valid_key( $key ) ) {
return false;
}
if ( empty( $group ) ) {
$group = 'default';
}
$id = $this->_key( $key, $group );
$found = false;
$found_in_oc = false;
$cache_val = false;
if ( array_key_exists( $id, $this->_cache ) && ! $force ) {
$found = true;
$cache_val = $this->_cache[ $id ];
++$this->count_hit_incall;
} elseif ( ! array_key_exists( $id, $this->_cache_404 ) && ! $this->_object_cache->is_non_persistent( $group ) ) {
$v = $this->_object_cache->get( $id );
if ( null !== $v ) {
$v = maybe_unserialize( $v );
}
// To be compatible with false val.
if ( is_array( $v ) && array_key_exists( 'data', $v ) ) {
++$this->count_hit;
$found = true;
$found_in_oc = true;
$cache_val = $v['data'];
} else {
// Can't find key, cache it to 404.
$this->_cache_404[ $id ] = 1;
++$this->count_miss;
}
} else {
++$this->count_miss_incall;
}
if ( is_object( $cache_val ) ) {
$cache_val = clone $cache_val;
}
// If not found but has `Store Transients` cfg on, still need to follow WP's get_transient() logic.
if ( ! $found && $this->_object_cache->store_transients( $group ) ) {
$cache_val = $this->_transient_get( $key, $group );
if ( $cache_val ) {
$found = true;
}
}
if ( $found_in_oc ) {
$this->_cache[ $id ] = $cache_val;
}
++$this->cache_total;
return $cache_val;
}
/**
* Retrieves multiple values from the cache in one call.
*
* @since 5.4
* @access public
*
* @param array $keys Array of keys under which the cache contents are stored.
* @param string $group Optional. Where the cache contents are grouped. Default 'default'.
* @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.
*/
public function get_multiple( $keys, $group = 'default', $force = false ) {
$values = array();
foreach ( $keys as $key ) {
$values[ $key ] = $this->get( $key, $group, $force );
}
return $values;
}
/**
* Removes the contents of the cache key in the group.
*
* If the cache key does not exist in the group, then nothing will happen.
*
* @since 1.8
* @access public
*
* @param int|string $key What the contents in the cache are called.
* @param string $group Optional. Where the cache contents are grouped. Default 'default'.
* @return bool True on success, false if the contents were not deleted.
*/
public function delete( $key, $group = 'default' ) {
if ( ! $this->is_valid_key( $key ) ) {
return false;
}
if ( empty( $group ) ) {
$group = 'default';
}
$id = $this->_key( $key, $group );
if ( $this->_object_cache->store_transients( $group ) ) {
$this->_transient_del( $key, $group );
}
if ( array_key_exists( $id, $this->_cache ) ) {
unset( $this->_cache[ $id ] );
}
if ( $this->_object_cache->is_non_persistent( $group ) ) {
return false;
}
return $this->_object_cache->delete( $id );
}
/**
* Deletes multiple values from the cache in one call.
*
* @since 5.4
* @access public
*
* @param array $keys Array of keys to be 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.
*/
public function delete_multiple( array $keys, $group = '' ) {
$values = array();
foreach ( $keys as $key ) {
$values[ $key ] = $this->delete( $key, $group );
}
return $values;
}
/**
* Increments numeric cache item's value.
*
* @since 5.4
* @access public
*
* @param int|string $key The cache key to increment.
* @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 'default'.
* @return int|false The item's new value on success, false on failure.
*/
public function incr( $key, $offset = 1, $group = 'default' ) {
return $this->incr_desr( $key, $offset, $group, true );
}
/**
* Decrements numeric cache item's value.
*
* @since 5.4
* @access public
*
* @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 'default'.
* @return int|false The item's new value on success, false on failure.
*/
public function decr( $key, $offset = 1, $group = 'default' ) {
return $this->incr_desr( $key, $offset, $group, false );
}
/**
* Increments or decrements numeric cache item's value.
*
* @since 1.8
* @access public
*
* @param int|string $key The cache key to increment or decrement.
* @param int $offset The amount by which to adjust the item's value.
* @param string $group Optional. The group the key is in. Default 'default'.
* @param bool $incr True to increment, false to decrement.
* @return int|false The item's new value on success, false on failure.
*/
public function incr_desr( $key, $offset = 1, $group = 'default', $incr = true ) {
if ( ! $this->is_valid_key( $key ) ) {
return false;
}
if ( empty( $group ) ) {
$group = 'default';
}
$cache_val = $this->get( $key, $group );
if ( false === $cache_val ) {
return false;
}
if ( ! is_numeric( $cache_val ) ) {
$cache_val = 0;
}
$offset = (int) $offset;
if ( $incr ) {
$cache_val += $offset;
} else {
$cache_val -= $offset;
}
if ( $cache_val < 0 ) {
$cache_val = 0;
}
$this->set( $key, $cache_val, $group );
return $cache_val;
}
/**
* Clears the object cache of all data.
*
* @since 1.8
* @access public
*
* @return true Always returns true.
*/
public function flush() {
$this->flush_runtime();
$this->_object_cache->flush();
return true;
}
/**
* Removes all cache items from the in-memory runtime cache.
*
* @since 5.4
* @access public
*
* @return true Always returns true.
*/
public function flush_runtime() {
$this->_cache = array();
$this->_cache_404 = array();
return true;
}
/**
* Removes all cache items in a group.
*
* @since 5.4
* @access public
*
* @return true Always returns true.
*/
public function flush_group() {
return true;
}
/**
* Sets the list of global cache groups.
*
* @since 1.8
* @access public
*
* @param string|string[] $groups List of groups that are global.
*/
public function add_global_groups( $groups ) {
$groups = (array) $groups;
$this->_object_cache->add_global_groups( $groups );
}
/**
* Sets the list of non-persistent cache groups.
*
* @since 1.8
* @access public
*
* @param string|string[] $groups A group or an array of groups to add.
*/
public function add_non_persistent_groups( $groups ) {
$groups = (array) $groups;
$this->_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
*
* @param int $blog_id Blog ID.
*/
public function switch_to_blog( $blog_id ) {
$blog_id = (int) $blog_id;
$this->blog_prefix = $this->multisite ? $blog_id . ':' : '';
}
/**
* Get transient from wp table
*
* Retrieves transient data from WordPress options table.
*
* @since 1.8.3
* @access private
* @see `wp-includes/option.php` function `get_transient`/`set_site_transient`
*
* @param string $transient Transient name.
* @param string $group Transient group ('transient' or 'site-transient').
* @return mixed Transient value or false if not found.
*/
private function _transient_get( $transient, $group ) {
if ( 'transient' === $group ) {
/**** Ori WP func start */
$transient_option = '_transient_' . $transient;
if ( ! wp_installing() ) {
// If option is not in alloptions, it is not autoloaded and thus has a timeout
$alloptions = wp_load_alloptions();
if ( ! isset( $alloptions[ $transient_option ] ) ) {
$transient_timeout = '_transient_timeout_' . $transient;
$timeout = get_option( $transient_timeout );
if ( false !== $timeout && $timeout < time() ) {
delete_option( $transient_option );
delete_option( $transient_timeout );
$value = false;
}
}
}
if ( ! isset( $value ) ) {
$value = get_option( $transient_option );
}
/**** Ori WP func end */
} elseif ( 'site-transient' === $group ) {
/**** Ori WP func start */
$no_timeout = array( 'update_core', 'update_plugins', 'update_themes' );
$transient_option = '_site_transient_' . $transient;
if ( ! in_array( $transient, $no_timeout, true ) ) {
$transient_timeout = '_site_transient_timeout_' . $transient;
$timeout = get_site_option( $transient_timeout );
if ( false !== $timeout && $timeout < time() ) {
delete_site_option( $transient_option );
delete_site_option( $transient_timeout );
$value = false;
}
}
if ( ! isset( $value ) ) {
$value = get_site_option( $transient_option );
}
/**** Ori WP func end */
} else {
$value = false;
}
return $value;
}
/**
* Set transient to WP table
*
* Stores transient data in WordPress options table.
*
* @since 1.8.3
* @access private
* @see `wp-includes/option.php` function `set_transient`/`set_site_transient`
*
* @param string $transient Transient name.
* @param mixed $value Transient value.
* @param string $group Transient group ('transient' or 'site-transient').
* @param int $expiration Time until expiration in seconds.
* @return bool True on success, false on failure.
*/
private function _transient_set( $transient, $value, $group, $expiration ) {
if ( 'transient' === $group ) {
/**** Ori WP func start */
$transient_timeout = '_transient_timeout_' . $transient;
$transient_option = '_transient_' . $transient;
if ( false === get_option( $transient_option ) ) {
$autoload = 'yes';
if ( (int) $expiration ) {
$autoload = 'no';
add_option( $transient_timeout, time() + (int) $expiration, '', 'no' );
}
$result = add_option( $transient_option, $value, '', $autoload );
} else {
// If expiration is requested, but the transient has no timeout option,
// delete, then re-create transient rather than update.
$update = true;
if ( (int) $expiration ) {
if ( false === get_option( $transient_timeout ) ) {
delete_option( $transient_option );
add_option( $transient_timeout, time() + (int) $expiration, '', 'no' );
$result = add_option( $transient_option, $value, '', 'no' );
$update = false;
} else {
update_option( $transient_timeout, time() + (int) $expiration );
}
}
if ( $update ) {
$result = update_option( $transient_option, $value );
}
}
/**** Ori WP func end */
} elseif ( 'site-transient' === $group ) {
/**** Ori WP func start */
$transient_timeout = '_site_transient_timeout_' . $transient;
$option = '_site_transient_' . $transient;
if ( false === get_site_option( $option ) ) {
if ( (int) $expiration ) {
add_site_option( $transient_timeout, time() + (int) $expiration );
}
$result = add_site_option( $option, $value );
} else {
if ( (int) $expiration ) {
update_site_option( $transient_timeout, time() + (int) $expiration );
}
$result = update_site_option( $option, $value );
}
/**** Ori WP func end */
} else {
$result = null;
}
return $result;
}
/**
* Delete transient from WP table
*
* Removes transient data from WordPress options table.
*
* @since 1.8.3
* @access private
* @see `wp-includes/option.php` function `delete_transient`/`delete_site_transient`
*
* @param string $transient Transient name.
* @param string $group Transient group ('transient' or 'site-transient').
*/
private function _transient_del( $transient, $group ) {
if ( 'transient' === $group ) {
/**** Ori WP func start */
$option_timeout = '_transient_timeout_' . $transient;
$option = '_transient_' . $transient;
$result = delete_option( $option );
if ( $result ) {
delete_option( $option_timeout );
}
/**** Ori WP func end */
} elseif ( 'site-transient' === $group ) {
/**** Ori WP func start */
$option_timeout = '_site_transient_timeout_' . $transient;
$option = '_site_transient_' . $transient;
$result = delete_site_option( $option );
if ( $result ) {
delete_site_option( $option_timeout );
}
/**** Ori WP func end */
}
}
/**
* Get the current instance object.
*
* @since 1.8
* @access public
*
* @return WP_Object_Cache The current instance.
*/
public static function get_instance() {
if ( ! isset( self::$_instance ) ) {
self::$_instance = new self();
}
return self::$_instance;
}
}