Файл: IPBMafia.ru_IPB_3.4.6_Final_Rus _Nulled/board/upload/ips_kernel/classCacheDiskcache.php
Строк: 143
<?php
/**
* <pre>
* Invision Power Services
* IP.Board v3.4.6
* This class acts as a cache layer, allowing you to store and retrieve data in
* external cache sources such as memcache or APC
* Last Updated: $Date: 2012-05-10 16:10:13 -0400 (Thu, 10 May 2012) $
* </pre>
*
* @author $Author: bfarber $
* @copyright (c) 2001 - 2009 Invision Power Services, Inc.
* @license http://www.invisionpower.com/company/standards.php#license
* @package IP.Board
* @subpackage Kernel
* @link http://www.invisionpower.com
* @since Friday 19th May 2006 17:33
* @version $Revision: 10721 $
*
* Basic Usage Examples
* <code>
* $cache = new cache_lib( 'identifier' );
* Update:
* $cache->putInCache( 'key', 'value' [, 'ttl'] );
* Remove
* $cache->removeFromCache( 'key' );
* Retrieve
* $cache->getFromCache( 'key' );
* </code>
*
*/
class classCacheDiskcache implements interfaceCache
{
/**
* Identifier
*
* @var string
*/
protected $identifier = '';
/**
* Constructor
*
* @param string Unique identifier
* @return @e boolean
*/
public function __construct( $identifier='' )
{
if( !is_writeable( DOC_IPS_ROOT_PATH . 'cache' ) )
{
$this->crashed = true;
return false;
}
if( !is_file( DOC_IPS_ROOT_PATH . 'cache/diskcache_lock.php' ) )
{
$fh = @fopen( DOC_IPS_ROOT_PATH . 'cache/diskcache_lock.php', 'wb' );
if( $fh )
{
flock( $fh, LOCK_EX );
fwrite( $fh, 0 );
flock( $fh, LOCK_UN );
fclose( $fh );
}
}
$this->identifier = $identifier;
}
/**
* Put data into remote cache store
*
* @param string Cache unique key
* @param string Cache value to add
* @param integer [Optional] Time to live
* @return @e boolean
*/
public function putInCache( $key, $value, $ttl=0 )
{
$lock = @fopen( DOC_IPS_ROOT_PATH . 'cache/diskcache_lock.php', 'wb' );
if( $lock )
{
flock( $lock, LOCK_EX );
}
$fh = @fopen( DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php', 'wb' );
if( !$fh )
{
return FALSE;
}
$extra_flag = "";
if( is_array( $value ) )
{
$value = serialize($value);
$extra_flag = "n" . '$is_array = 1;' . "nn";
}
$extra_flag .= "n" . '$ttl = ' . $ttl . ";nn";
$value = '"' . addslashes( $value ) . '"';
$file_content = "<?" . "phpnn" . '$value = ' . $value . ";n" . $extra_flag . "n?" . '>';
flock( $fh, LOCK_EX );
fwrite( $fh, $file_content );
flock( $fh, LOCK_UN );
fclose( $fh );
@chmod( DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php', IPS_FILE_PERMISSION );
flock( $lock, LOCK_UN );
fclose( $lock );
return true;
}
/**
* Retrieve a value from remote cache store
*
* @param string Cache unique key
* @return @e mixed
*/
public function getFromCache( $key )
{
$lock = @fopen( DOC_IPS_ROOT_PATH . 'cache/diskcache_lock.php', 'wb' );
if( $lock )
{
flock( $lock, LOCK_SH );
}
$return_val = "";
if( is_file( DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php' ) )
{
require DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php';/*noLibHook*/
$return_val = stripslashes($value);
if( !empty($is_array) )
{
$return_val = unserialize($return_val);
}
if( !empty($ttl) )
{
if( $mtime = filemtime( DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php' ) )
{
if( time() - $mtime > $ttl )
{
@unlink( DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php' );
return FALSE;
}
}
}
}
flock( $lock, LOCK_UN );
fclose( $lock );
return $return_val;
}
/**
* Update value in remote cache store
*
* @param string Cache unique key
* @param string Cache value to set
* @param integer [Optional] Time to live
* @return @e boolean
*/
public function updateInCache( $key, $value, $ttl=0 )
{
// The putInCache method opens in 'wb' mode, meaning
// the file is truncated automatically, so no
// need to delete - deletion is an unnecessary
// expense with diskcache
return $this->putInCache( $key, $value, $ttl );
}
/**
* Remove a value in the remote cache store
*
* @param string Cache unique key
* @return @e boolean
*/
public function removeFromCache( $key )
{
$lock = @fopen( DOC_IPS_ROOT_PATH . 'cache/diskcache_lock.php', 'wb' );
if( $lock )
{
flock( $lock, LOCK_EX );
}
if( is_file( DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php' ) )
{
@unlink( DOC_IPS_ROOT_PATH . 'cache/' . md5( $this->identifier . $key ) . '.php' );
}
flock( $lock, LOCK_UN );
fclose( $lock );
return true;
}
/**
* Not used by this library
*
* @return @e boolean
*/
public function disconnect()
{
return true;
}
}