laipower/wp-content/plugins/w3-total-cache/ObjectCache_WpObjectCache_Regular.php

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<?php
namespace W3TC;
/**
* W3 Object Cache object
*/
class ObjectCache_WpObjectCache_Regular {
/**
* Internal cache array
*
* @var array
*/
var $cache = array();
/**
* Array of global groups
*
* @var array
*/
var $global_groups = array();
/**
* List of non-persistent groups
*
* @var array
*/
var $nonpersistent_groups = array();
/**
* Total count of calls
*/
var $cache_total = 0;
/**
* Cache hits count
*/
var $cache_hits = 0;
/**
* Number of flushes
*/
private $cache_flushes = 0;
private $cache_sets = 0;
/**
* Total time (microsecs)
*
* @var integer
*/
var $time_total = 0;
private $log_filehandle = false;
/**
* Blog id of cache
*
* @var integer
*/
private $_blog_id;
/**
* Key cache
*
* @var array
*/
var $_key_cache = array();
/**
* Config
*/
var $_config = null;
/**
* Caching flag
*
* @var boolean
*/
var $_caching = false;
/**
* Dynamic Caching flag
*
* @var boolean
*/
var $_can_cache_dynamic = null;
/**
* Cache reject reason
*
* @var string
*/
private $cache_reject_reason = '';
/**
* Lifetime
*
* @var integer
*/
var $_lifetime = null;
/**
* Debug flag
*
* @var boolean
*/
var $_debug = false;
private $stats_enabled = false;
/**
* PHP5 style constructor
*/
function __construct() {
$this->_config = Dispatcher::config();
$this->_lifetime = $this->_config->get_integer( 'objectcache.lifetime' );
$this->_debug = $this->_config->get_boolean( 'objectcache.debug' );
$this->_caching = $this->_can_cache();
$this->global_groups = $this->_config->get_array( 'objectcache.groups.global' );
$this->nonpersistent_groups = $this->_config->get_array(
'objectcache.groups.nonpersistent' );
$this->stats_enabled = $this->_config->get_boolean( 'stats.enabled' );
$this->_blog_id = Util_Environment::blog_id();
}
/**
* Get from the cache
*
* @param string $id
* @param string $group
* @return mixed
*/
function get( $id, $group = 'default', $force = false, &$found = null ) {
if ( $this->_debug || $this->stats_enabled ) {
$time_start = Util_Debug::microtime();
}
if ( empty( $group ) ) {
$group = 'default';
}
$key = $this->_get_cache_key( $id, $group );
$in_incall_cache = isset( $this->cache[$key] );
$fallback_used = false;
$cache_total_inc = 0;
$cache_hits_inc = 0;
if ( $in_incall_cache && !$force ) {
$found = true;
$value = $this->cache[$key];
} elseif ( $this->_caching &&
!in_array( $group, $this->nonpersistent_groups ) &&
$this->_check_can_cache_runtime( $group ) ) {
$cache = $this->_get_cache( null, $group );
$v = $cache->get( $key );
/* for debugging
$a = $cache->_get_with_old_raw( $key );
$path = $cache->get_full_path( $key);
$returned = 'x ' . $path . ' ' .
(is_readable( $path ) ? ' readable ' : ' not-readable ') .
json_encode($a);
*/
$cache_total_inc = 1;
if ( is_array( $v ) && isset( $v['content'] ) ) {
$found = true;
$value = $v['content'];
$cache_hits_inc = 1;
} else {
$found = false;
$value = false;
}
} else {
$found = false;
$value = false;
}
if ( $value === null ) {
$value = false;
}
if ( is_object( $value ) ) {
$value = clone $value;
}
if ( !$found &&
$this->_is_transient_group( $group ) &&
$this->_config->get_boolean( 'objectcache.fallback_transients' ) ) {
$fallback_used = true;
$value = $this->_transient_fallback_get( $id, $group );
$found = ( $value !== false );
}
if ( $found ) {
if ( !$in_incall_cache ) {
$this->cache[$key] = $value;
}
}
/**
* Add debug info
*/
if ( !$in_incall_cache ) {
$this->cache_total += $cache_total_inc;
$this->cache_hits += $cache_hits_inc;
if ( $this->_debug || $this->stats_enabled ) {
$time = Util_Debug::microtime() - $time_start;
$this->time_total += $time;
if ( $this->_debug ) {
if ( $fallback_used ) {
if ( !$found ) {
$returned = 'not in db';
} else {
$returned = 'from db fallback';
}
} else {
if ( !$found ) {
if ( $cache_total_inc <= 0 ) {
$returned = 'not tried cache';
} else {
$returned = 'not in cache';
}
} else {
$returned = 'from persistent cache';
}
}
$this->log_call( array(
date( 'r' ),
'get',
$group,
$id,
$returned,
( $value ? strlen( serialize( $value ) ) : 0 ),
(int)($time * 1000000)
) );
}
}
}
return $value;
}
/**
* Set to the cache
*
* @param string $id
* @param mixed $data
* @param string $group
* @param integer $expire
* @return boolean
*/
function set( $id, $data, $group = 'default', $expire = 0 ) {
if ( $this->_debug || $this->stats_enabled ) {
$time_start = Util_Debug::microtime();
}
if ( empty( $group ) ) {
$group = 'default';
}
$key = $this->_get_cache_key( $id, $group );
if ( is_object( $data ) ) {
$data = clone $data;
}
$this->cache[$key] = $data;
$return = true;
$ext_return = NULL;
$cache_sets_inc = 0;
if ( $this->_caching &&
!in_array( $group, $this->nonpersistent_groups ) &&
$this->_check_can_cache_runtime( $group ) ) {
$cache = $this->_get_cache( null, $group );
if ( $id == 'alloptions' && $group == 'options' ) {
// alloptions are deserialized on the start when some classes are not loaded yet
// so postpone it until requested
foreach ( $data as $k => $v ) {
if ( is_object( $v ) ) {
$data[$k] = serialize( $v );
}
}
}
$v = array( 'content' => $data );
$cache_sets_inc = 1;
$ext_return = $cache->set( $key, $v,
( $expire ? $expire : $this->_lifetime ) );
$return = $ext_return;
}
if ( $this->_is_transient_group( $group ) &&
$this->_config->get_boolean( 'objectcache.fallback_transients' ) ) {
$this->_transient_fallback_set( $id, $data, $group, $expire );
}
if ( $this->_debug || $this->stats_enabled ) {
$time = Util_Debug::microtime() - $time_start;
$this->cache_sets += $cache_sets_inc;
$this->time_total += $time;
if ( $this->_debug ) {
if ( is_null( $ext_return ) ) {
$reason = 'not set ' . $this->cache_reject_reason;
} else if ( $ext_return ) {
$reason = 'put in cache';
} else {
$reason = 'failed';
}
$this->log_call( array(
date( 'r' ),
'set',
$group,
$id,
$reason,
( $data ? strlen( serialize( $data ) ) : 0 ),
(int)($time * 1000000)
) );
}
}
return $return;
}
/**
* Delete from the cache
*
* @param string $id
* @param string $group
* @param bool $force
* @return boolean
*/
function delete( $id, $group = 'default', $force = false ) {
if ( !$force && $this->get( $id, $group ) === false ) {
return false;
}
$key = $this->_get_cache_key( $id, $group );
$return = true;
unset( $this->cache[$key] );
if ( $this->_caching && !in_array( $group, $this->nonpersistent_groups ) ) {
$cache = $this->_get_cache( null, $group );
$return = $cache->delete( $key );
}
if ( $this->_is_transient_group( $group ) &&
$this->_config->get_boolean( 'objectcache.fallback_transients' ) ) {
$this->_transient_fallback_delete( $id, $group );
}
if ( $this->_debug ) {
$this->log_call( array(
date( 'r' ),
'delete',
$group,
$id,
( $return ? 'deleted' : 'discarded' ),
0,
0
) );
}
return $return;
}
/**
* Add to the cache
*
* @param string $id
* @param mixed $data
* @param string $group
* @param integer $expire
* @return boolean
*/
function add( $id, $data, $group = 'default', $expire = 0 ) {
if ( $this->get( $id, $group ) !== false ) {
return false;
}
return $this->set( $id, $data, $group, $expire );
}
/**
* Replace in the cache
*
* @param string $id
* @param mixed $data
* @param string $group
* @param integer $expire
* @return boolean
*/
function replace( $id, $data, $group = 'default', $expire = 0 ) {
if ( $this->get( $id, $group ) === false ) {
return false;
}
return $this->set( $id, $data, $group, $expire );
}
/**
* Reset keys
*
* @return boolean
*/
function reset() {
$this->cache = array();
return true;
}
/**
* Flush cache
*
* @return boolean
*/
function flush( $reason = '' ) {
if ( $this->_debug || $this->stats_enabled ) {
$time_start = Util_Debug::microtime();
}
if ( $this->_config->get_boolean( 'objectcache.debug_purge' ) ) {
Util_Debug::log_purge( 'objectcache', 'flush', $reason );
}
$this->cache = array();
global $w3_multisite_blogs;
if ( isset( $w3_multisite_blogs ) ) {
foreach ( $w3_multisite_blogs as $blog ) {
$cache = $this->_get_cache( $blog->userblog_id );
$cache->flush();
}
} else {
$cache = $this->_get_cache( 0 );
$cache->flush();
$cache = $this->_get_cache();
$cache->flush();
}
if ( $this->_debug || $this->stats_enabled ) {
$time = Util_Debug::microtime() - $time_start;
$this->cache_flushes++;
$this->time_total += $time;
if ( $this->_debug ) {
$this->log_call( array(
date( 'r' ),
'flush',
'',
'',
$reason,
0,
(int)($time * 1000000)
) );
}
}
return true;
}
/**
* Add global groups
*
* @param array $groups
* @return void
*/
function add_global_groups( $groups ) {
if ( !is_array( $groups ) ) {
$groups = (array) $groups;
}
$this->global_groups = array_merge( $this->global_groups, $groups );
$this->global_groups = array_unique( $this->global_groups );
}
/**
* Add non-persistent groups
*
* @param array $groups
* @return void
*/
function add_nonpersistent_groups( $groups ) {
if ( !is_array( $groups ) ) {
$groups = (array) $groups;
}
$this->nonpersistent_groups = array_merge( $this->nonpersistent_groups, $groups );
$this->nonpersistent_groups = array_unique( $this->nonpersistent_groups );
}
/**
* Increment numeric cache item's value
*
* @param int|string $key The cache key to increment
* @param int $offset The amount by which to increment the item's value. Default is 1.
* @param string $group The group the key is in.
* @return bool|int False on failure, the item's new value on success.
*/
function incr( $key, $offset = 1, $group = 'default' ) {
$value = $this->get( $key, $group );
if ( $value === false )
return false;
if ( !is_numeric( $value ) )
$value = 0;
$offset = (int) $offset;
$value += $offset;
if ( $value < 0 )
$value = 0;
$this->replace( $key, $value, $group );
return $value;
}
/**
* Decrement numeric cache item's value
*
* @param int|string $key The cache key to increment
* @param int $offset The amount by which to decrement the item's value. Default is 1.
* @param string $group The group the key is in.
* @return bool|int False on failure, the item's new value on success.
*/
function decr( $key, $offset = 1, $group = 'default' ) {
$value = $this->get( $key, $group );
if ( $value === false )
return false;
if ( !is_numeric( $value ) )
$value = 0;
$offset = (int) $offset;
$value -= $offset;
if ( $value < 0 )
$value = 0;
$this->replace( $key, $value, $group );
return $value;
}
private function _transient_fallback_get( $transient, $group ) {
if ( $group == 'transient' ) {
$transient_option = '_transient_' . $transient;
if ( function_exists( 'wp_installing') && ! 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 );
} elseif ( $group == 'site-transient' ) {
// Core transients that do not have a timeout. Listed here so querying timeouts can be avoided.
$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 );
} else {
$value = false;
}
return $value;
}
private function _transient_fallback_delete( $transient, $group ) {
if ( $group == 'transient' ) {
$option_timeout = '_transient_timeout_' . $transient;
$option = '_transient_' . $transient;
$result = delete_option( $option );
if ( $result )
delete_option( $option_timeout );
} elseif ( $group == 'site-transient' ) {
$option_timeout = '_site_transient_timeout_' . $transient;
$option = '_site_transient_' . $transient;
$result = delete_site_option( $option );
if ( $result )
delete_site_option( $option_timeout );
}
}
private function _transient_fallback_set( $transient, $value, $group, $expiration ) {
if ( $group == 'transient' ) {
$transient_timeout = '_transient_timeout_' . $transient;
$transient_option = '_transient_' . $transient;
if ( false === get_option( $transient_option ) ) {
$autoload = 'yes';
if ( $expiration ) {
$autoload = 'no';
add_option( $transient_timeout, time() + $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 ( $expiration ) {
if ( false === get_option( $transient_timeout ) ) {
delete_option( $transient_option );
add_option( $transient_timeout, time() + $expiration, '', 'no' );
$result = add_option( $transient_option, $value, '', 'no' );
$update = false;
} else {
update_option( $transient_timeout, time() + $expiration );
}
}
if ( $update ) {
$result = update_option( $transient_option, $value );
}
}
} elseif ( $group == 'site-transient' ) {
$transient_timeout = '_site_transient_timeout_' . $transient;
$option = '_site_transient_' . $transient;
if ( false === get_site_option( $option ) ) {
if ( $expiration )
add_site_option( $transient_timeout, time() + $expiration );
$result = add_site_option( $option, $value );
} else {
if ( $expiration )
update_site_option( $transient_timeout, time() + $expiration );
$result = update_site_option( $option, $value );
}
}
}
/**
* Switches context to another blog
*
* @param integer $blog_id
*/
function switch_blog( $blog_id ) {
$this->reset();
$this->_blog_id = $blog_id;
}
/**
* Returns cache key
*
* @param string $id
* @param string $group
* @return string
*/
function _get_cache_key( $id, $group = 'default' ) {
if ( !$group ) {
$group = 'default';
}
$blog_id = $this->_blog_id;
if ( in_array( $group, $this->global_groups ) )
$blog_id = 0;
return $blog_id . $group . $id;
}
public function get_usage_statistics_cache_config() {
$engine = $this->_config->get_string( 'objectcache.engine' );
switch ( $engine ) {
case 'memcached':
$engineConfig = array(
'servers' => $this->_config->get_array( 'objectcache.memcached.servers' ),
'persistent' => $this->_config->get_boolean( 'objectcache.memcached.persistent' ),
'aws_autodiscovery' => $this->_config->get_boolean( 'objectcache.memcached.aws_autodiscovery' ),
'username' => $this->_config->get_string( 'objectcache.memcached.username' ),
'password' => $this->_config->get_string( 'objectcache.memcached.password' ),
'binary_protocol' => $this->_config->get_boolean( 'objectcache.memcached.binary_protocol' )
);
break;
case 'redis':
$engineConfig = array(
'servers' => $this->_config->get_array( 'objectcache.redis.servers' ),
'verify_tls_certificates' => $this->_config->get_boolean( 'objectcache.redis.verify_tls_certificates' ),
'persistent' => $this->_config->get_boolean( 'objectcache.redis.persistent' ),
'timeout' => $this->_config->get_integer( 'objectcache.redis.timeout' ),
'retry_interval' => $this->_config->get_integer( 'objectcache.redis.retry_interval' ),
'read_timeout' => $this->_config->get_integer( 'objectcache.redis.read_timeout' ),
'dbid' => $this->_config->get_integer( 'objectcache.redis.dbid' ),
'password' => $this->_config->get_string( 'objectcache.redis.password' )
);
break;
default:
$engineConfig = array();
}
$engineConfig['engine'] = $engine;
return $engineConfig;
}
/**
* Returns cache object
*
* @param int|null $blog_id
* @param string $group
* @return W3_Cache_Base
*/
function _get_cache( $blog_id = null, $group = '' ) {
static $cache = array();
if ( is_null( $blog_id ) && !in_array( $group, $this->global_groups ) )
$blog_id = $this->_blog_id;
elseif ( is_null( $blog_id ) )
$blog_id = 0;
if ( !isset( $cache[$blog_id] ) ) {
$engine = $this->_config->get_string( 'objectcache.engine' );
switch ( $engine ) {
case 'memcached':
$engineConfig = array(
'servers' => $this->_config->get_array( 'objectcache.memcached.servers' ),
'persistent' => $this->_config->get_boolean(
'objectcache.memcached.persistent' ),
'aws_autodiscovery' => $this->_config->get_boolean( 'objectcache.memcached.aws_autodiscovery' ),
'username' => $this->_config->get_string( 'objectcache.memcached.username' ),
'password' => $this->_config->get_string( 'objectcache.memcached.password' ),
'binary_protocol' => $this->_config->get_boolean( 'objectcache.memcached.binary_protocol' )
);
break;
case 'redis':
$engineConfig = array(
'servers' => $this->_config->get_array( 'objectcache.redis.servers' ),
'verify_tls_certificates' => $this->_config->get_boolean( 'objectcache.redis.verify_tls_certificates' ),
'persistent' => $this->_config->get_boolean( 'objectcache.redis.persistent' ),
'timeout' => $this->_config->get_integer( 'objectcache.redis.timeout' ),
'retry_interval' => $this->_config->get_integer( 'objectcache.redis.retry_interval' ),
'read_timeout' => $this->_config->get_integer( 'objectcache.redis.read_timeout' ),
'dbid' => $this->_config->get_integer( 'objectcache.redis.dbid' ),
'password' => $this->_config->get_string( 'objectcache.redis.password' )
);
break;
case 'file':
$engineConfig = array(
'section' => 'object',
'locking' => $this->_config->get_boolean( 'objectcache.file.locking' ),
'flush_timelimit' => $this->_config->get_integer( 'timelimit.cache_flush' )
);
break;
default:
$engineConfig = array();
}
$engineConfig['blog_id'] = $blog_id;
$engineConfig['module'] = 'object';
$engineConfig['host'] = Util_Environment::host();
$engineConfig['instance_id'] = Util_Environment::instance_id();
$cache[$blog_id] = Cache::instance( $engine, $engineConfig );
}
return $cache[$blog_id];
}
/**
* Check if caching allowed on init
*
* @return boolean
*/
function _can_cache() {
/**
* Skip if disabled
*/
if ( !$this->_config->get_boolean( 'objectcache.enabled' ) ) {
$this->cache_reject_reason = 'objectcache.disabled';
return false;
}
/**
* Check for DONOTCACHEOBJECT constant
*/
if ( defined( 'DONOTCACHEOBJECT' ) && DONOTCACHEOBJECT ) {
$this->cache_reject_reason = 'DONOTCACHEOBJECT';
return false;
}
return true;
}
/**
* Returns if we can cache, that condition can change in runtime
*
* @param unknown $group
* @return boolean
*/
function _check_can_cache_runtime( $group ) {
//Need to be handled in wp admin as well as frontend
if ( $this->_is_transient_group( $group ) )
return true;
if ( $this->_can_cache_dynamic != null )
return $this->_can_cache_dynamic;
if ( $this->_config->get_boolean( 'objectcache.enabled_for_wp_admin' ) ) {
$this->_can_cache_dynamic = true;
} else {
if ( $this->_caching ) {
if ( defined( 'WP_ADMIN' ) &&
( !defined( 'DOING_AJAX' ) || !DOING_AJAX ) ) {
$this->_can_cache_dynamic = false;
$this->cache_reject_reason = 'WP_ADMIN defined';
return $this->_can_cache_dynamic;
}
}
}
return $this->_caching;
}
private function _is_transient_group( $group ) {
return in_array( $group, array( 'transient', 'site-transient' ) ) ;
}
public function w3tc_footer_comment( $strings ) {
$reason = $this->get_reject_reason();
$append = empty( $reason ) ? '' : sprintf( ' (%1$s)', $reason );
$strings[] = sprintf(
// translators: 1: Cache hits, 2: Cache total cache objects, 3: Engine anme, 4: Reason.
__( 'Object Caching %1$d/%2$d objects using %3$s%4$s', 'w3-total-cache' ),
$this->cache_hits,
$this->cache_total,
Cache::engine_name( $this->_config->get_string( 'objectcache.engine' ) ),
$append
);
if ( $this->_config->get_boolean( 'objectcache.debug' ) ) {
$strings[] = '';
$strings[] = 'Object Cache debug info:';
$strings[] = sprintf( "%s%s", str_pad( 'Caching: ', 20 ),
( $this->_caching ? 'enabled' : 'disabled' ) );
$strings[] = sprintf( "%s%d", str_pad( 'Total calls: ', 20 ), $this->cache_total );
$strings[] = sprintf( "%s%d", str_pad( 'Cache hits: ', 20 ), $this->cache_hits );
$strings[] = sprintf( "%s%.4f", str_pad( 'Total time: ', 20 ), $this->time_total );
if ( $this->log_filehandle ) {
fclose( $this->log_filehandle );
$this->log_filehandle = false;
}
}
return $strings;
}
public function w3tc_usage_statistics_of_request( $storage ) {
$storage->counter_add( 'objectcache_get_total', $this->cache_total );
$storage->counter_add( 'objectcache_get_hits', $this->cache_hits );
$storage->counter_add( 'objectcache_sets', $this->cache_sets );
$storage->counter_add( 'objectcache_flushes', $this->cache_flushes );
$storage->counter_add( 'objectcache_time_ms', (int)($this->time_total * 1000) );
}
public function get_reject_reason() {
if ( is_null( $this->cache_reject_reason ) )
return '';
return $this->_get_reject_reason_message( $this->cache_reject_reason );
}
/**
*
*
* @param unknown $key
* @return string|void
*/
private function _get_reject_reason_message( $key ) {
if ( !function_exists( '__' ) )
return $key;
switch ( $key ) {
case 'objectcache.disabled':
return __( 'Object caching is disabled', 'w3-total-cache' );
case 'DONOTCACHEOBJECT':
return __( 'DONOTCACHEOBJECT constant is defined', 'w3-total-cache' );
default:
return '';
}
}
private function log_call( $line ) {
if ( !$this->log_filehandle ) {
$filename = Util_Debug::log_filename( 'objectcache-calls' );
$this->log_filehandle = fopen( $filename, 'a' );
}
fputcsv ( $this->log_filehandle, $line, "\t" );
}
}