a22573bf0b
- WordPress core y plugins - Tema Twenty Twenty-Four configurado - Plugin allow-unfiltered-html.php simplificado - .gitignore configurado para excluir wp-config.php y uploads 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
360 lines
12 KiB
PHP
Executable File
360 lines
12 KiB
PHP
Executable File
<?php
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/**
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* File: Cache_Xcache.php
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*
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* @package W3TC
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*/
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namespace W3TC;
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/**
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* Class Cache_Xcache
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*
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* phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore
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* phpcs:disable PSR2.Methods.MethodDeclaration.Underscore
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* phpcs:disable WordPress.PHP.DiscouragedPHPFunctions.serialize_serialize
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* phpcs:disable WordPress.PHP.DiscouragedPHPFunctions.serialize_unserialize
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* phpcs:disable WordPress.PHP.NoSilencedErrors.Discouraged
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*/
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class Cache_Xcache extends Cache_Base {
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/**
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* Used for faster flushing
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*
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* @var integer $_key_version
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*/
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private $_key_version = array();
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/**
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* Adds a new item to the cache if it does not already exist.
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*
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* If the item does not exist in the cache, it is added with the specified expiration and group. If it already exists,
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* the method returns false.
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*
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* @param string $key The unique key to identify the cached item.
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* @param mixed $value The value to store in the cache (passed by reference).
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* @param int $expire The expiration time in seconds. Defaults to 0 (no expiration).
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* @param string $group The group to which the key belongs. Defaults to an empty string.
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*
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* @return bool True if the item was added successfully, false if the item already exists.
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*/
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public function add( $key, &$value, $expire = 0, $group = '' ) {
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if ( false === $this->get( $key, $group ) ) {
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return $this->set( $key, $value, $expire, $group );
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}
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return false;
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}
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/**
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* Sets a value in the cache, overwriting any existing value.
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*
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* This method sets a value in the cache for a given key, with an optional expiration time and group. If the value
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* does not have a `key_version`, it is assigned the current group key version.
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*
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* @param string $key The unique key to identify the cached item.
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* @param mixed $value The value to store in the cache.
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* @param int $expire The expiration time in seconds. Defaults to 0 (no expiration).
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* @param string $group The group to which the key belongs. Defaults to an empty string.
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*
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* @return bool True if the value was successfully stored, false otherwise.
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*/
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public function set( $key, $value, $expire = 0, $group = '' ) {
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if ( ! isset( $value['key_version'] ) ) {
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$value['key_version'] = $this->_get_key_version( $group );
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}
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$storage_key = $this->get_item_key( $key );
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return xcache_set( $storage_key, serialize( $value ), $expire );
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}
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/**
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* Retrieves a cached item along with its version status.
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*
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* This method retrieves the cached value for a given key, checking if the key version matches the current group key
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* version. It also determines whether the cached value is expired and returns a flag indicating if old data is used.
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*
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* @param string $key The unique key to identify the cached item.
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* @param string $group The group to which the key belongs. Defaults to an empty string.
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*
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* @return array An array containing the cached value (or null if not found) and a boolean indicating old data usage.
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*/
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public function get_with_old( $key, $group = '' ) {
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$has_old_data = false;
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$storage_key = $this->get_item_key( $key );
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$v = @unserialize( xcache_get( $storage_key ) );
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if ( ! is_array( $v ) || ! isset( $v['key_version'] ) ) {
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return array( null, $has_old_data );
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}
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$key_version = $this->_get_key_version( $group );
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if ( $v['key_version'] === $key_version ) {
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return array( $v, $has_old_data );
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}
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if ( $v['key_version'] > $key_version ) {
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if ( ! empty( $v['key_version_at_creation'] ) && $v['key_version_at_creation'] !== $key_version ) {
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$this->_set_key_version( $v['key_version'], $group );
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}
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return array( $v, $has_old_data );
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}
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// key version is old.
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if ( ! $this->_use_expired_data ) {
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return array( null, $has_old_data );
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}
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// if we have expired data - update it for future use and let current process recalculate it.
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$expires_at = isset( $v['expires_at'] ) ? $v['expires_at'] : null;
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if ( null === $expires_at || time() > $expires_at ) {
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$v['expires_at'] = time() + 30;
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xcache_set( $storage_key, serialize( $v ), 0 );
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$has_old_data = true;
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return array( null, $has_old_data );
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}
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// return old version.
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return array( $v, $has_old_data );
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}
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/**
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* Replaces an existing cached item with a new value.
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*
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* This method updates the value for a given key only if the key already exists in the cache.
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*
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* @param string $key The unique key to identify the cached item.
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* @param mixed $value The new value to store in the cache (passed by reference).
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* @param int $expire The expiration time in seconds. Defaults to 0 (no expiration).
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* @param string $group The group to which the key belongs. Defaults to an empty string.
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*
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* @return bool True if the value was replaced successfully, false if the key does not exist.
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*/
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public function replace( $key, &$value, $expire = 0, $group = '' ) {
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if ( $this->get( $key, $group ) !== false ) {
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return $this->set( $key, $value, $expire, $group );
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}
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return false;
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}
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/**
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* Deletes a cached item, optionally keeping expired data.
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*
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* If expired data usage is enabled, the key version is set to 0 instead of completely removing the item.
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* Otherwise, the item is fully deleted from the cache.
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*
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* @param string $key The unique key to identify the cached item.
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* @param string $group The group to which the key belongs. Defaults to an empty string.
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*
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* @return bool True if the item was deleted successfully, false otherwise.
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*/
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public function delete( $key, $group = '' ) {
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$storage_key = $this->get_item_key( $key );
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if ( $this->_use_expired_data ) {
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$v = @unserialize( xcache_get( $storage_key ) );
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if ( is_array( $v ) ) {
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$v['key_version'] = 0;
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xcache_set( $storage_key, serialize( $v ), 0 );
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return true;
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}
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}
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return xcache_unset( $storage_key );
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}
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/**
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* Completely removes a cached item from the cache.
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*
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* This method fully deletes the cached item, bypassing any logic for handling expired data.
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*
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* @param string $key The unique key to identify the cached item.
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* @param string $group The group to which the key belongs. Defaults to an empty string.
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*
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* @return bool True if the item was removed successfully, false otherwise.
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*/
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public function hard_delete( $key, $group = '' ) {
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$storage_key = $this->get_item_key( $key );
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return xcache_unset( $storage_key );
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}
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/**
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* Flushes the cache for a specific group or all groups.
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*
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* This increments the key version for the specified group, effectively invalidating all cache entries
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* associated with the current key version.
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*
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* @param string $group (Optional) The cache group to flush. Default is an empty string, which applies to all groups.
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*
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* @return bool True on success.
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*/
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public function flush( $group = '' ) {
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$this->_get_key_version( $group ); // initialize $this->_key_version.
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++$this->_key_version[ $group ];
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$this->_set_key_version( $this->_key_version[ $group ], $group );
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return true;
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}
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/**
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* Gets the key version extension for ahead-of-time cache generation.
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*
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* This provides the current key version and the next version to be used for generating ahead-of-time cache.
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*
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* @param string $group The cache group to retrieve the extension for.
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*
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* @return array An associative array with:
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* - 'key_version' (int): The next key version.
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* - 'key_version_at_creation' (int): The current key version.
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*/
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public function get_ahead_generation_extension( $group ) {
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$v = $this->_get_key_version( $group );
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return array(
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'key_version' => $v + 1,
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'key_version_at_creation' => $v,
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);
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}
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/**
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* Updates the key version for a cache group after ahead-of-time generation.
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*
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* If the provided key version is higher than the current version, the key version is updated.
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*
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* @param string $group The cache group to update.
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* @param array $extension {
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* The extension data containing 'key_version'.
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*
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* @type string $key_version The version of the cache key.
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* }
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*
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* @return void
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*/
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public function flush_group_after_ahead_generation( $group, $extension ) {
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$v = $this->_get_key_version( $group );
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if ( $extension['key_version'] > $v ) {
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$this->_set_key_version( $extension['key_version'], $group );
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}
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}
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/**
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* Checks if Wincache is available on the server.
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*
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* @return bool True if Wincache functions are available, false otherwise.
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*/
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public function available() {
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return function_exists( 'xcache_set' );
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}
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/**
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* Retrieves the current key version for a cache group.
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*
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* If no version exists, initializes the version to 1.
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*
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* @param string $group (Optional) The cache group to retrieve the key version for. Default is an empty string.
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*
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* @return int The current key version for the specified group.
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*/
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private function _get_key_version( $group = '' ) {
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if ( ! isset( $this->_key_version[ $group ] ) || $this->_key_version[ $group ] <= 0 ) {
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$v = xcache_get( $this->_get_key_version_key( $group ) );
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$v = intval( $v );
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$this->_key_version[ $group ] = ( $v > 0 ? $v : 1 );
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}
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return $this->_key_version[ $group ];
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}
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/**
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* Sets the key version for a cache group.
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*
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* @param int $v The key version to set.
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* @param string $group (Optional) The cache group to set the key version for. Default is an empty string.
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*
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* @return void
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*/
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private function _set_key_version( $v, $group = '' ) {
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xcache_set( $this->_get_key_version_key( $group ), $v, 0 );
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}
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/**
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* Sets a value conditionally if the old value matches the expected value.
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*
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* This method attempts to simulate an atomic check-and-set operation. If the current value does not
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* match the old value, the operation fails.
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*
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* @param string $key The cache key to update.
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* @param array $old_value {
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* The expected current value.
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*
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* @type string $content The expected content to compare.
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* }
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* @param array $new_value The new value to set.
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*
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* @return bool True if the operation succeeds, false otherwise.
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*/
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public function set_if_maybe_equals( $key, $old_value, $new_value ) {
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// cant guarantee atomic action here, filelocks fail often.
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$value = $this->get( $key );
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if ( isset( $old_value['content'] ) && $value['content'] !== $old_value['content'] ) {
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return false;
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}
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return $this->set( $key, $new_value );
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}
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/**
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* Increments a counter by the specified value.
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*
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* If the counter does not exist, initializes it with a value of 0 before incrementing.
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*
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* @param string $key The key of the counter to increment.
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* @param int $value The value to increment the counter by.
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*
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* @return int|bool The new counter value on success, or false on failure.
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*/
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public function counter_add( $key, $value ) {
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if ( 0 === $value ) {
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return true;
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}
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$storage_key = $this->get_item_key( $key );
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$r = xcache_inc( $storage_key, $value );
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if ( ! $r ) { // it doesnt initialize counter by itself.
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$this->counter_set( $key, 0 );
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}
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return $r;
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}
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/**
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* Sets the value of a counter.
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*
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* @param string $key The key of the counter to set.
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* @param int $value The value to set the counter to.
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*
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* @return bool True on success, false on failure.
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*/
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public function counter_set( $key, $value ) {
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$storage_key = $this->get_item_key( $key );
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return xcache_set( $storage_key, $value );
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}
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/**
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* Retrieves the value of a counter.
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*
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* @param string $key The key of the counter to retrieve.
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*
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* @return int The current counter value, or 0 if the counter does not exist.
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*/
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public function counter_get( $key ) {
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$storage_key = $this->get_item_key( $key );
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$v = (int) xcache_get( $storage_key );
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return $v;
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}
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}
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