Index: branches/5.2.x/core/install/install_toolkit.php
===================================================================
diff -u -N -r16513 -r16753
--- branches/5.2.x/core/install/install_toolkit.php	(.../install_toolkit.php)	(revision 16513)
+++ branches/5.2.x/core/install/install_toolkit.php	(.../install_toolkit.php)	(revision 16753)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: install_toolkit.php 16513 2017-01-20 14:10:53Z alex $
+* @version	$Id: install_toolkit.php 16753 2023-03-21 08:51:35Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -970,7 +970,11 @@
 			$cache_handler = $this->Application->makeClass('kCache');
 
 			$cache_handlers = Array (
-				'Fake' => 'None', 'Memcache' => 'Memcached', 'XCache' => 'XCache', 'Apc' => 'Alternative PHP Cache'
+				'Fake' => 'None',
+				'Memcached' => 'Memcached (via "Memcached" extension)',
+				'Memcache' => 'Memcached (via "Memcache" extension)',
+				'XCache' => 'XCache',
+				'Apc' => 'Alternative PHP Cache',
 			);
 
 			foreach ($cache_handlers AS $class_prefix => $title) {
Index: branches/5.2.x/core/kernel/utility/cache.php
===================================================================
diff -u -N -r16435 -r16753
--- branches/5.2.x/core/kernel/utility/cache.php	(.../cache.php)	(revision 16435)
+++ branches/5.2.x/core/kernel/utility/cache.php	(.../cache.php)	(revision 16753)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: cache.php 16435 2016-11-18 10:46:05Z alex $
+* @version	$Id: cache.php 16753 2023-03-21 08:51:35Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -823,7 +823,117 @@
 		}
 	}
 
+	class MemcachedCacheHandler extends kCacheHandler {
 
+		/**
+		 * Memcache connection
+		 *
+		 * @var Memcached
+		 * @access protected
+		 */
+		protected $_handler = null;
+
+		/**
+		 * MemcachedCacheHandler constructor.
+		 *
+		 * @param kCache $parent          Parent.
+		 * @param string $default_servers Default servers.
+		 */
+		public function __construct(kCache $parent, $default_servers = '')
+		{
+			parent::__construct($parent);
+
+			$this->cachingType = CACHING_TYPE_MEMORY;
+
+			$memcached_servers = kUtil::getSystemConfig()->get('MemcacheServers', $default_servers);
+
+			if ( $memcached_servers && class_exists('Memcached') ) {
+				$this->_enabled = true;
+				$this->_handler = new Memcached();
+				$servers = explode(';', $memcached_servers);
+
+				foreach ( $servers as $server ) {
+					if ( preg_match('/(.*):([\d]+)$/', $server, $regs) ) {
+						// Possible format: "hostname:port" OR "unix:///path/to/socket:0".
+						$server = $regs[1];
+						$port = $regs[2];
+					}
+					else {
+						$port = 11211;
+					}
+
+					$this->_handler->addServer($server, $port);
+				}
+
+				// Verify, that memcache server is working.
+				if ( !$this->_handler->set('test', 1) ) {
+					$this->_enabled = false;
+				}
+			}
+		}
+
+		/**
+		 * Retrieves value from cache
+		 *
+		 * @param string|array $name Name.
+		 *
+		 * @return mixed
+		 * @access public
+		 */
+		public function get($name)
+		{
+			if ( is_array($name) ) {
+				return $this->_handler->getMulti($name);
+			}
+
+			return $this->_handler->get($name);
+		}
+
+		/**
+		 * Stores value in cache
+		 *
+		 * @param string  $name       Name.
+		 * @param mixed   $value      Value.
+		 * @param integer $expiration Expiration.
+		 *
+		 * @return boolean
+		 * @access public
+		 */
+		public function set($name, $value, $expiration = 0)
+		{
+			return $this->_handler->set($name, $value, $expiration);
+		}
+
+		/**
+		 * Stores value in cache (only if it's not there already)
+		 *
+		 * @param string  $name       Name.
+		 * @param mixed   $value      Value.
+		 * @param integer $expiration Expiration.
+		 *
+		 * @return boolean
+		 * @access public
+		 */
+		public function add($name, $value, $expiration = 0)
+		{
+			return $this->_handler->add($name, $value, $expiration);
+		}
+
+		/**
+		 * Deletes key from cache
+		 *
+		 * @param string $name Name.
+		 *
+		 * @return boolean
+		 * @access public
+		 */
+		public function delete($name)
+		{
+			return $this->_handler->delete($name);
+		}
+
+	}
+
 	class ApcCacheHandler extends kCacheHandler {
 
 		public function __construct(kCache $parent)
@@ -974,4 +1084,4 @@
 		{
 			return xcache_unset($name);
 		}
-	}
\ No newline at end of file
+	}