12 files changed, 140 insertions, 196 deletions
diff --git a/phpBB/phpbb/cache/driver/apc.php b/phpBB/phpbb/cache/driver/apc.php
index 0516b669c8..77b7b11181 100644
--- a/phpBB/phpbb/cache/driver/apc.php
+++ b/phpBB/phpbb/cache/driver/apc.php
@@ -7,26 +7,18 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * ACM for APC
 * @package acm
 */
-class phpbb_cache_driver_apc extends phpbb_cache_driver_memory
+class apc extends \phpbb\cache\driver\memory
 {
 	var $extension = 'apc';
 
 	/**
-	* Purge cache data
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
diff --git a/phpBB/phpbb/cache/driver/base.php b/phpBB/phpbb/cache/driver/base.php
index 32e04f813a..feaca25a5b 100644
--- a/phpBB/phpbb/cache/driver/base.php
+++ b/phpBB/phpbb/cache/driver/base.php
@@ -7,17 +7,11 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * @package acm
 */
-abstract class phpbb_cache_driver_base implements phpbb_cache_driver_interface
+abstract class base implements \phpbb\cache\driver\driver_interface
 {
 }
diff --git a/phpBB/phpbb/cache/driver/interface.php b/phpBB/phpbb/cache/driver/driver_interface.php
index 53f684d1c8..8929647411 100644
--- a/phpBB/phpbb/cache/driver/interface.php
+++ b/phpBB/phpbb/cache/driver/driver_interface.php
@@ -7,63 +7,84 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * An interface that all cache drivers must implement
 *
 * @package acm
 */
-interface phpbb_cache_driver_interface
+interface driver_interface
 {
 	/**
 	* Load global cache
+	*
+	* @return mixed False if an error was encountered, otherwise the data type of the cached data
 	*/
 	public function load();
 
 	/**
 	* Unload cache object
+	*
+	* @return null
 	*/
 	public function unload();
 
 	/**
 	* Save modified objects
+	*
+	* @return null
 	*/
 	public function save();
 
 	/**
 	* Tidy cache
+	*
+	* @return null
 	*/
 	public function tidy();
 
 	/**
 	* Get saved cache object
+	*
+	* @param string $var_name 		Cache key
+	* @return mixed 				False if an error was encountered, otherwise the saved cached object
 	*/
 	public function get($var_name);
 
 	/**
 	* Put data into cache
+	*
+	* @param string $var_name 		Cache key
+	* @param mixed $var 			Cached data to store
+	* @param int $ttl 				Time-to-live of cached data
+	* @return null
 	*/
 	public function put($var_name, $var, $ttl = 0);
 
 	/**
 	* Purge cache data
+	*
+	* @return null
 	*/
 	public function purge();
 
 	/**
 	* Destroy cache data
+	*
+	* @param string $var_name 		Cache key
+	* @param string $table 			Table name
+	* @return null
 	*/
 	public function destroy($var_name, $table = '');
 
 	/**
 	* Check if a given cache entry exists
+	*
+	* @param string $var_name 		Cache key
+	*
+	* @return bool 					True if cache file exists and has not expired.
+	*								False otherwise.
 	*/
 	public function _exists($var_name);
 
@@ -85,10 +106,10 @@ interface phpbb_cache_driver_interface
 	* result to persistent storage. In other words, there is no need
 	* to call save() afterwards.
 	*
-	* @param phpbb_db_driver $db	Database connection
+	* @param \phpbb\db\driver\driver_interface $db	Database connection
 	* @param string $query			SQL query, should be used for generating storage key
-	* @param mixed $query_result	The result from dbal::sql_query, to be passed to
-	* 								dbal::sql_fetchrow to get all rows and store them
+	* @param mixed $query_result	The result from \dbal::sql_query, to be passed to
+	* 								\dbal::sql_fetchrow to get all rows and store them
 	* 								in cache.
 	* @param int $ttl				Time to live, after this timeout the query should
 	*								expire from the cache.
@@ -96,7 +117,7 @@ interface phpbb_cache_driver_interface
 	* 								representing the query should be returned. Otherwise
 	* 								the original $query_result should be returned.
 	*/
-	public function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl);
+	public function sql_save(\phpbb\db\driver\driver_interface $db, $query, $query_result, $ttl);
 
 	/**
 	* Check if result for a given SQL query exists in cache.
diff --git a/phpBB/phpbb/cache/driver/eaccelerator.php b/phpBB/phpbb/cache/driver/eaccelerator.php
index 257b90c76e..d1ad69ef6d 100644
--- a/phpBB/phpbb/cache/driver/eaccelerator.php
+++ b/phpBB/phpbb/cache/driver/eaccelerator.php
@@ -7,20 +7,14 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * ACM for eAccelerator
 * @package acm
 * @todo Missing locks from destroy() talk with David
 */
-class phpbb_cache_driver_eaccelerator extends phpbb_cache_driver_memory
+class eaccelerator extends \phpbb\cache\driver\memory
 {
 	var $extension = 'eaccelerator';
 	var $function = 'eaccelerator_get';
@@ -28,9 +22,7 @@ class phpbb_cache_driver_eaccelerator extends phpbb_cache_driver_memory
 	var $serialize_header = '#phpbb-serialized#';
 
 	/**
-	* Purge cache data
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
@@ -45,10 +37,8 @@ class phpbb_cache_driver_eaccelerator extends phpbb_cache_driver_memory
 	}
 
 	/**
-	 * Perform cache garbage collection
-	 *
-	 * @return null
-	 */
+	* {@inheritDoc}
+	*/
 	function tidy()
 	{
 		eaccelerator_gc();
diff --git a/phpBB/phpbb/cache/driver/file.php b/phpBB/phpbb/cache/driver/file.php
index 944dfd6541..286ba328c3 100644
--- a/phpBB/phpbb/cache/driver/file.php
+++ b/phpBB/phpbb/cache/driver/file.php
@@ -7,19 +7,13 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * ACM File Based Caching
 * @package acm
 */
-class phpbb_cache_driver_file extends phpbb_cache_driver_base
+class file extends \phpbb\cache\driver\base
 {
 	var $vars = array();
 	var $var_expires = array();
@@ -39,7 +33,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Load global cache
+	* {@inheritDoc}
 	*/
 	function load()
 	{
@@ -47,7 +41,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Unload cache object
+	* {@inheritDoc}
 	*/
 	function unload()
 	{
@@ -64,7 +58,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Save modified objects
+	* {@inheritDoc}
 	*/
 	function save()
 	{
@@ -99,7 +93,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Tidy cache
+	* {@inheritDoc}
 	*/
 	function tidy()
 	{
@@ -161,7 +155,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Get saved cache object
+	* {@inheritDoc}
 	*/
 	function get($var_name)
 	{
@@ -183,7 +177,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Put data into cache
+	* {@inheritDoc}
 	*/
 	function put($var_name, $var, $ttl = 31536000)
 	{
@@ -200,14 +194,14 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Purge cache data
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
 		// Purge all phpbb cache files
-		try 
+		try
 		{
-			$iterator = new DirectoryIterator($this->cache_dir);
+			$iterator = new \DirectoryIterator($this->cache_dir);
 		}
 		catch (Exception $e)
 		{
@@ -256,9 +250,9 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	*/
 	protected function remove_dir($dir)
 	{
-		try 
+		try
 		{
-			$iterator = new DirectoryIterator($dir);
+			$iterator = new \DirectoryIterator($dir);
 		}
 		catch (Exception $e)
 		{
@@ -286,7 +280,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Destroy cache data
+	* {@inheritDoc}
 	*/
 	function destroy($var_name, $table = '')
 	{
@@ -365,7 +359,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Check if a given cache entry exist
+	* {@inheritDoc}
 	*/
 	function _exists($var_name)
 	{
@@ -391,7 +385,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Load cached sql query
+	* {@inheritDoc}
 	*/
 	function sql_load($query)
 	{
@@ -413,7 +407,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	/**
 	* {@inheritDoc}
 	*/
-	function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl)
+	function sql_save(\phpbb\db\driver\driver_interface $db, $query, $query_result, $ttl)
 	{
 		// Remove extra spaces and tabs
 		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
@@ -437,7 +431,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Ceck if a given sql query exist in cache
+	* {@inheritDoc}
 	*/
 	function sql_exists($query_id)
 	{
@@ -445,7 +439,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Fetch row from cache (database)
+	* {@inheritDoc}
 	*/
 	function sql_fetchrow($query_id)
 	{
@@ -458,7 +452,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Fetch a field from the current row of a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_fetchfield($query_id, $field)
 	{
@@ -471,7 +465,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Seek a specific row in an a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_rowseek($rownum, $query_id)
 	{
@@ -485,7 +479,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Free memory used for a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_freeresult($query_id)
 	{
@@ -695,7 +689,7 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 
 		$file = "{$this->cache_dir}$filename.$phpEx";
 
-		$lock = new phpbb_lock_flock($file);
+		$lock = new \phpbb\lock\flock($file);
 		$lock->acquire();
 
 		if ($handle = @fopen($file, 'wb'))
@@ -764,6 +758,10 @@ class phpbb_cache_driver_file extends phpbb_cache_driver_base
 
 	/**
 	* Removes/unlinks file
+	*
+	* @param string $filename Filename to remove
+	* @param bool $check Check file permissions
+	* @return bool True if the file was successfully removed, otherwise false
 	*/
 	function remove_file($filename, $check = false)
 	{
diff --git a/phpBB/phpbb/cache/driver/memcache.php b/phpBB/phpbb/cache/driver/memcache.php
index 3fd16b23b0..eb3fced973 100644
--- a/phpBB/phpbb/cache/driver/memcache.php
+++ b/phpBB/phpbb/cache/driver/memcache.php
@@ -7,13 +7,7 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 if (!defined('PHPBB_ACM_MEMCACHE_PORT'))
 {
@@ -40,7 +34,7 @@ if (!defined('PHPBB_ACM_MEMCACHE'))
 * ACM for Memcached
 * @package acm
 */
-class phpbb_cache_driver_memcache extends phpbb_cache_driver_memory
+class memcache extends \phpbb\cache\driver\memory
 {
 	var $extension = 'memcache';
 
@@ -52,7 +46,7 @@ class phpbb_cache_driver_memcache extends phpbb_cache_driver_memory
 		// Call the parent constructor
 		parent::__construct();
 
-		$this->memcache = new Memcache;
+		$this->memcache = new \Memcache;
 		foreach(explode(',', PHPBB_ACM_MEMCACHE) as $u)
 		{
 			$parts = explode('/', $u);
@@ -62,9 +56,7 @@ class phpbb_cache_driver_memcache extends phpbb_cache_driver_memory
 	}
 
 	/**
-	* Unload the cache resources
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function unload()
 	{
@@ -74,9 +66,7 @@ class phpbb_cache_driver_memcache extends phpbb_cache_driver_memory
 	}
 
 	/**
-	* Purge cache data
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
diff --git a/phpBB/phpbb/cache/driver/memory.php b/phpBB/phpbb/cache/driver/memory.php
index f77a1df316..d5404455d1 100644
--- a/phpBB/phpbb/cache/driver/memory.php
+++ b/phpBB/phpbb/cache/driver/memory.php
@@ -7,19 +7,13 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * ACM Abstract Memory Class
 * @package acm
 */
-abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
+abstract class memory extends \phpbb\cache\driver\base
 {
 	var $key_prefix;
 
@@ -56,7 +50,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Load global cache
+	* {@inheritDoc}
 	*/
 	function load()
 	{
@@ -72,7 +66,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Unload cache object
+	* {@inheritDoc}
 	*/
 	function unload()
 	{
@@ -87,7 +81,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Save modified objects
+	* {@inheritDoc}
 	*/
 	function save()
 	{
@@ -102,7 +96,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Tidy cache
+	* {@inheritDoc}
 	*/
 	function tidy()
 	{
@@ -112,7 +106,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Get saved cache object
+	* {@inheritDoc}
 	*/
 	function get($var_name)
 	{
@@ -132,7 +126,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Put data into cache
+	* {@inheritDoc}
 	*/
 	function put($var_name, $var, $ttl = 2592000)
 	{
@@ -148,7 +142,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Purge cache data
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
@@ -189,7 +183,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 
 
 	/**
-	* Destroy cache data
+	* {@inheritDoc}
 	*/
 	function destroy($var_name, $table = '')
 	{
@@ -243,7 +237,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Check if a given cache entry exist
+	* {@inheritDoc}
 	*/
 	function _exists($var_name)
 	{
@@ -263,7 +257,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Load cached sql query
+	* {@inheritDoc}
 	*/
 	function sql_load($query)
 	{
@@ -285,7 +279,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	/**
 	* {@inheritDoc}
 	*/
-	function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl)
+	function sql_save(\phpbb\db\driver\driver_interface $db, $query, $query_result, $ttl)
 	{
 		// Remove extra spaces and tabs
 		$query = preg_replace('/[\n\r\s\t]+/', ' ', $query);
@@ -341,7 +335,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Ceck if a given sql query exist in cache
+	* {@inheritDoc}
 	*/
 	function sql_exists($query_id)
 	{
@@ -349,7 +343,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Fetch row from cache (database)
+	* {@inheritDoc}
 	*/
 	function sql_fetchrow($query_id)
 	{
@@ -362,7 +356,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Fetch a field from the current row of a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_fetchfield($query_id, $field)
 	{
@@ -375,7 +369,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Seek a specific row in an a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_rowseek($rownum, $query_id)
 	{
@@ -389,7 +383,7 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Free memory used for a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_freeresult($query_id)
 	{
@@ -406,6 +400,10 @@ abstract class phpbb_cache_driver_memory extends phpbb_cache_driver_base
 
 	/**
 	* Removes/unlinks file
+	*
+	* @param string $filename Filename to remove
+	* @param bool $check Check file permissions
+	* @return bool True if the file was successfully removed, otherwise false
 	*/
 	function remove_file($filename, $check = false)
 	{
diff --git a/phpBB/phpbb/cache/driver/null.php b/phpBB/phpbb/cache/driver/null.php
index 2fadc27ba3..99cfe454e0 100644
--- a/phpBB/phpbb/cache/driver/null.php
+++ b/phpBB/phpbb/cache/driver/null.php
@@ -7,19 +7,13 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * ACM Null Caching
 * @package acm
 */
-class phpbb_cache_driver_null extends phpbb_cache_driver_base
+class null extends \phpbb\cache\driver\base
 {
 	/**
 	* Set cache path
@@ -29,7 +23,7 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Load global cache
+	* {@inheritDoc}
 	*/
 	function load()
 	{
@@ -37,21 +31,21 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Unload cache object
+	* {@inheritDoc}
 	*/
 	function unload()
 	{
 	}
 
 	/**
-	* Save modified objects
+	* {@inheritDoc}
 	*/
 	function save()
 	{
 	}
 
 	/**
-	* Tidy cache
+	* {@inheritDoc}
 	*/
 	function tidy()
 	{
@@ -60,7 +54,7 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Get saved cache object
+	* {@inheritDoc}
 	*/
 	function get($var_name)
 	{
@@ -68,28 +62,28 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Put data into cache
+	* {@inheritDoc}
 	*/
 	function put($var_name, $var, $ttl = 0)
 	{
 	}
 
 	/**
-	* Purge cache data
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
 	}
 
 	/**
-	* Destroy cache data
+	* {@inheritDoc}
 	*/
 	function destroy($var_name, $table = '')
 	{
 	}
 
 	/**
-	* Check if a given cache entry exist
+	* {@inheritDoc}
 	*/
 	function _exists($var_name)
 	{
@@ -97,7 +91,7 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Load cached sql query
+	* {@inheritDoc}
 	*/
 	function sql_load($query)
 	{
@@ -107,13 +101,13 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	/**
 	* {@inheritDoc}
 	*/
-	function sql_save(phpbb_db_driver $db, $query, $query_result, $ttl)
+	function sql_save(\phpbb\db\driver\driver_interface $db, $query, $query_result, $ttl)
 	{
 		return $query_result;
 	}
 
 	/**
-	* Ceck if a given sql query exist in cache
+	* {@inheritDoc}
 	*/
 	function sql_exists($query_id)
 	{
@@ -121,7 +115,7 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Fetch row from cache (database)
+	* {@inheritDoc}
 	*/
 	function sql_fetchrow($query_id)
 	{
@@ -129,7 +123,7 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Fetch a field from the current row of a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_fetchfield($query_id, $field)
 	{
@@ -137,7 +131,7 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Seek a specific row in an a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_rowseek($rownum, $query_id)
 	{
@@ -145,7 +139,7 @@ class phpbb_cache_driver_null extends phpbb_cache_driver_base
 	}
 
 	/**
-	* Free memory used for a cached database result (database)
+	* {@inheritDoc}
 	*/
 	function sql_freeresult($query_id)
 	{
diff --git a/phpBB/phpbb/cache/driver/redis.php b/phpBB/phpbb/cache/driver/redis.php
index 960735b673..2f2a32a12d 100644
--- a/phpBB/phpbb/cache/driver/redis.php
+++ b/phpBB/phpbb/cache/driver/redis.php
@@ -7,13 +7,7 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 if (!defined('PHPBB_ACM_REDIS_PORT'))
 {
@@ -33,7 +27,7 @@ if (!defined('PHPBB_ACM_REDIS_HOST'))
 *
 * @package acm
 */
-class phpbb_cache_driver_redis extends phpbb_cache_driver_memory
+class redis extends \phpbb\cache\driver\memory
 {
 	var $extension = 'redis';
 
@@ -56,7 +50,7 @@ class phpbb_cache_driver_redis extends phpbb_cache_driver_memory
 		// Call the parent constructor
 		parent::__construct();
 
-		$this->redis = new Redis();
+		$this->redis = new \Redis();
 
 		$args = func_get_args();
 		if (!empty($args))
@@ -83,8 +77,8 @@ class phpbb_cache_driver_redis extends phpbb_cache_driver_memory
 			}
 		}
 
-		$this->redis->setOption(Redis::OPT_SERIALIZER, Redis::SERIALIZER_PHP);
-		$this->redis->setOption(Redis::OPT_PREFIX, $this->key_prefix);
+		$this->redis->setOption(\Redis::OPT_SERIALIZER, \Redis::SERIALIZER_PHP);
+		$this->redis->setOption(\Redis::OPT_PREFIX, $this->key_prefix);
 
 		if (defined('PHPBB_ACM_REDIS_DB'))
 		{
@@ -98,9 +92,7 @@ class phpbb_cache_driver_redis extends phpbb_cache_driver_memory
 	}
 
 	/**
-	* Unload the cache resources
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function unload()
 	{
@@ -110,9 +102,7 @@ class phpbb_cache_driver_redis extends phpbb_cache_driver_memory
 	}
 
 	/**
-	* Purge cache data
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
@@ -163,4 +153,3 @@ class phpbb_cache_driver_redis extends phpbb_cache_driver_memory
 		return false;
 	}
 }
-
diff --git a/phpBB/phpbb/cache/driver/wincache.php b/phpBB/phpbb/cache/driver/wincache.php
index 58f3b4a581..d0f636d9cb 100644
--- a/phpBB/phpbb/cache/driver/wincache.php
+++ b/phpBB/phpbb/cache/driver/wincache.php
@@ -7,26 +7,18 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * ACM for WinCache
 * @package acm
 */
-class phpbb_cache_driver_wincache extends phpbb_cache_driver_memory
+class wincache extends \phpbb\cache\driver\memory
 {
 	var $extension = 'wincache';
 
 	/**
-	* Purge cache data
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
diff --git a/phpBB/phpbb/cache/driver/xcache.php b/phpBB/phpbb/cache/driver/xcache.php
index 06c5fafd97..6c9323ec83 100644
--- a/phpBB/phpbb/cache/driver/xcache.php
+++ b/phpBB/phpbb/cache/driver/xcache.php
@@ -7,13 +7,7 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache\driver;
 
 /**
 * ACM for XCache
@@ -24,7 +18,7 @@ if (!defined('IN_PHPBB'))
 * - xcache.admin.enable_auth = off (or xcache.admin.user and xcache.admin.password set)
 *
 */
-class phpbb_cache_driver_xcache extends phpbb_cache_driver_memory
+class xcache extends \phpbb\cache\driver\memory
 {
 	var $extension = 'XCache';
 
@@ -39,9 +33,7 @@ class phpbb_cache_driver_xcache extends phpbb_cache_driver_memory
 	}
 
 	/**
-	* Purge cache data
-	*
-	* @return null
+	* {@inheritDoc}
 	*/
 	function purge()
 	{
diff --git a/phpBB/phpbb/cache/service.php b/phpBB/phpbb/cache/service.php
index 69c5e0fdd0..f9b6324b05 100644
--- a/phpBB/phpbb/cache/service.php
+++ b/phpBB/phpbb/cache/service.php
@@ -7,38 +7,32 @@
 *
 */
 
-/**
-* @ignore
-*/
-if (!defined('IN_PHPBB'))
-{
-	exit;
-}
+namespace phpbb\cache;
 
 /**
 * Class for grabbing/handling cached entries
 * @package acm
 */
-class phpbb_cache_service
+class service
 {
 	/**
 	* Cache driver.
 	*
-	* @var phpbb_cache_driver_interface
+	* @var \phpbb\cache\driver\driver_interface
 	*/
 	protected $driver;
 
 	/**
 	* The config.
 	*
-	* @var phpbb_config
+	* @var \phpbb\config\config
 	*/
 	protected $config;
 
 	/**
 	* Database connection.
 	*
-	* @var phpbb_db_driver
+	* @var \phpbb\db\driver\driver_interface
 	*/
 	protected $db;
 
@@ -59,13 +53,13 @@ class phpbb_cache_service
 	/**
 	* Creates a cache service around a cache driver
 	*
-	* @param phpbb_cache_driver_interface $driver The cache driver
-	* @param phpbb_config $config The config
-	* @param phpbb_db_driver $db Database connection
+	* @param \phpbb\cache\driver\driver_interface $driver The cache driver
+	* @param \phpbb\config\config $config The config
+	* @param \phpbb\db\driver\driver_interface $db Database connection
 	* @param string $phpbb_root_path Root path
 	* @param string $php_ext PHP extension
 	*/
-	public function __construct(phpbb_cache_driver_interface $driver, phpbb_config $config, phpbb_db_driver $db, $phpbb_root_path, $php_ext)
+	public function __construct(\phpbb\cache\driver\driver_interface $driver, \phpbb\config\config $config, \phpbb\db\driver\driver_interface $db, $phpbb_root_path, $php_ext)
 	{
 		$this->set_driver($driver);
 		$this->config = $config;
@@ -77,7 +71,7 @@ class phpbb_cache_service
 	/**
 	* Returns the cache driver used by this cache service.
 	*
-	* @return phpbb_cache_driver_interface The cache driver
+	* @return \phpbb\cache\driver\driver_interface The cache driver
 	*/
 	public function get_driver()
 	{
@@ -87,9 +81,9 @@ class phpbb_cache_service
 	/**
 	* Replaces the cache driver used by this cache service.
 	*
-	* @param phpbb_cache_driver_interface $driver The cache driver
+	* @param \phpbb\cache\driver\driver_interface $driver The cache driver
 	*/
-	public function set_driver(phpbb_cache_driver_interface $driver)
+	public function set_driver(\phpbb\cache\driver\driver_interface $driver)
 	{
 		$this->driver = $driver;
 	}