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Edit File : object.lib.php \| Size : 33.97 KB
<?php /** * LiteSpeed Object Cache Library * * @since 1.8 / defined('WPINC') \|\| exit(); /* * Handle exception / if (!function_exists('litespeed_exception_handler')) { function litespeed_exception_handler($errno, $errstr, $errfile, $errline) { throw new \ErrorException($errstr, 0, $errno, $errfile, $errline); } } require_once __DIR__ . '/object-cache.cls.php'; /* * Sets up Object Cache Global and assigns it. * * @since 1.8 * * @global WP_Object_Cache $wp_object_cache / function wp_cache_init() { $GLOBALS['wp_object_cache'] = WP_Object_Cache::get_instance(); } /* * Adds data to the cache, if the cache key doesn't already exist. * * @since 1.8 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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 * * @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); } class WP_Object_Cache { protected static $_instance; private $_object_cache; private $_cache = array(); private $_cache_404 = array(); private $cache_total = 0; private $count_hit_incall = 0; private $count_hit = 0; private $count_miss_incall = 0; private $count_miss = 0; private $count_set = 0; protected $global_groups = array(); private $blog_prefix; private $multisite; /* * Init. * * @since 1.8 / 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 / !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) { return $this->$name = $value; } /* * 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.') : / translators: %s: The type of the given cache key. / sprintf(__('Cache key must be integer or non-empty string, %s given.'), $type); _doing_it_wrong(sprintf('%s::%s', __CLASS__, debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1]['function']), $message, '6.1.0'); return false; } /* * Get the final key. * * @since 1.8 * @access private / private function _key($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. * * @since 1.8 * @access public / 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 * * @uses WP_Object_Cache::_exists() Checks to see if the cache already has data. * @uses WP_Object_Cache::set() Sets the data after the checking the cache * contents existence. * * @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; } // error_log("oc: set \t\t\t[key] " . $id ); $this->_cache[$id] = $data; if (array_key_exists($id, $this->_cache_404)) { // error_log("oc: unset404\t\t\t[key] " . $id ); unset($this->_cache_404[$id]); } if (!$this->_object_cache->is_non_persistent($group)) { $this->_object_cache->set($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); // error_log(''); // error_log("oc: get \t\t\t[key] " . $id . ( $force ? "\t\t\t [forced] " : '' ) ); $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 ($v !== null) { $v = @maybe_unserialize($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 // error_log("oc: add404\t\t\t[key] " . $id ); $this->_cache_404[$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; // $found not used for now (v1.8.3) } } if ($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'. * @param bool $deprecated Optional. Unused. Default false. * @return bool True on success, false if the contents were not deleted. / public function delete($key, $group = 'default', $deprecated = false) { if (!$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]); } // error_log("oc: delete \t\t\t[key] " . $id ); if ($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 * * @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 * * @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, $group, false); } /* * Increments or decrements numeric cache item's value. * * @since 1.8 * @access public / public function incr_desr($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 * * @param string $group Name of group to remove from cache. * @return true Always returns true. / public function flush_group($group) { // unset( $this->cache[ $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 / 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 ? $blog_id . ':' : ''; } /* * Get transient from wp table * * @since 1.8.3 * @access private * @see `wp-includes/option.php` function `get_transient`/`set_site_transient` / private function _transient_get($transient, $group) { if ($group == 'transient') { /* 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 ($group == 'site-transient') { / Ori WP func start / $no_timeout = array('update_core', 'update_plugins', 'update_themes'); $transient_option = '_site_transient_' . $transient; if (!in_array($transient, $no_timeout)) { $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 $value; } / * Set transient to WP table * * @since 1.8.3 * @access private * @see `wp-includes/option.php` function `set_transient`/`set_site_transient` / private function _transient_set($transient, $value, $group, $expiration) { if ($group == 'transient') { /* 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, $value); } } / Ori WP func end / } elseif ($group == 'site-transient') { / 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 $result; } / * Delete transient from WP table * * @since 1.8.3 * @access private * @see `wp-includes/option.php` function `delete_transient`/`delete_site_transient` / private function _transient_del($transient, $group) { if ($group == 'transient') { /* 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 ($group == 'site-transient') { / 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 */ public static function get_instance() { if (!isset(self::$_instance)) { self::$_instance = new self(); } return self::$_instance; } } Back

Edit File : object.lib.php | Size : 33.97 KB

<?php
/**
 * LiteSpeed Object Cache Library
 *
 * @since  1.8
 */
defined('WPINC') || exit();

/**
 * Handle exception
 */
if (!function_exists('litespeed_exception_handler')) {
	function litespeed_exception_handler($errno, $errstr, $errfile, $errline)
	{
		throw new \ErrorException($errstr, 0, $errno, $errfile, $errline);
	}
}

require_once __DIR__ . '/object-cache.cls.php';

/**
 * Sets up Object Cache Global and assigns it.
 *
 * @since 1.8
 *
 * @global WP_Object_Cache $wp_object_cache
 */
function wp_cache_init()
{
	$GLOBALS['wp_object_cache'] = WP_Object_Cache::get_instance();
}

/**
 * Adds data to the cache, if the cache key doesn't already exist.
 *
 * @since 1.8
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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
 *
 * @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);
}

class WP_Object_Cache
{
	protected static $_instance;

private $_object_cache;

private $_cache = array();
	private $_cache_404 = array();

private $cache_total = 0;
	private $count_hit_incall = 0;
	private $count_hit = 0;
	private $count_miss_incall = 0;
	private $count_miss = 0;
	private $count_set = 0;

protected $global_groups = array();
	private $blog_prefix;
	private $multisite;

/**
	 * Init.
	 *
	 * @since  1.8
	 */
	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
		 */
		!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)
	{
		return $this->$name = $value;
	}

/**
	 * 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.')
			: /* translators: %s: The type of the given cache key. */
			sprintf(__('Cache key must be integer or non-empty string, %s given.'), $type);

_doing_it_wrong(sprintf('%s::%s', __CLASS__, debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1]['function']), $message, '6.1.0');

return false;
	}

/**
	 * Get the final key.
	 *
	 * @since 1.8
	 * @access private
	 */
	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.
	 *
	 * @since  1.8
	 * @access public
	 */
	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
	 *
	 * @uses WP_Object_Cache::_exists() Checks to see if the cache already has data.
	 * @uses WP_Object_Cache::set()     Sets the data after the checking the cache
	 *                                  contents existence.
	 *
	 * @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;
		}
		// error_log("oc: set \t\t\t[key] " . $id );
		$this->_cache[$id] = $data;

if (array_key_exists($id, $this->_cache_404)) {
			// error_log("oc: unset404\t\t\t[key] " . $id );
			unset($this->_cache_404[$id]);
		}

if (!$this->_object_cache->is_non_persistent($group)) {
			$this->_object_cache->set($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);

// error_log('');
		// error_log("oc: get \t\t\t[key] " . $id . ( $force ? "\t\t\t [forced] " : '' ) );
		$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 ($v !== null) {
				$v = @maybe_unserialize($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
				// error_log("oc: add404\t\t\t[key] " . $id );
				$this->_cache_404[$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; // $found not used for now (v1.8.3)
			}
		}

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'.
	 * @param bool       $deprecated Optional. Unused. Default false.
	 * @return bool True on success, false if the contents were not deleted.
	 */
	public function delete($key, $group = 'default', $deprecated = false)
	{
		if (!$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]);
		}
		// error_log("oc: delete \t\t\t[key] " . $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
	 *
	 * @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
	 *
	 * @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
	 */
	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
	 *
	 * @param string $group Name of group to remove from cache.
	 * @return true Always returns true.
	 */
	public function flush_group($group)
	{
		// unset( $this->cache[ $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
	 */
	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
	 *
	 * @since 1.8.3
	 * @access private
	 * @see `wp-includes/option.php` function `get_transient`/`set_site_transient`
	 */
	private function _transient_get($transient, $group)
	{
		if ($group == 'transient') {
			/**** 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 ($group == 'site-transient') {
			/**** Ori WP func start ****/
			$no_timeout = array('update_core', 'update_plugins', 'update_themes');
			$transient_option = '_site_transient_' . $transient;
			if (!in_array($transient, $no_timeout)) {
				$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
	 *
	 * @since 1.8.3
	 * @access private
	 * @see `wp-includes/option.php` function `set_transient`/`set_site_transient`
	 */
	private function _transient_set($transient, $value, $group, $expiration)
	{
		if ($group == 'transient') {
			/**** 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, $value);
				}
			}
			/**** Ori WP func end ****/
		} elseif ($group == 'site-transient') {
			/**** 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
	 *
	 * @since 1.8.3
	 * @access private
	 * @see `wp-includes/option.php` function `delete_transient`/`delete_site_transient`
	 */
	private function _transient_del($transient, $group)
	{
		if ($group == 'transient') {
			/**** 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 ($group == 'site-transient') {
			/**** 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
	 */
	public static function get_instance()
	{
		if (!isset(self::$_instance)) {
			self::$_instance = new self();
		}

return self::$_instance;
	}
}

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