4 files changed, 18 insertions, 21 deletions
diff --git a/phpBB/phpbb/cache/driver/base.php b/phpBB/phpbb/cache/driver/base.php
index c83b928a12..55cd4668de 100644
--- a/phpBB/phpbb/cache/driver/base.php
+++ b/phpBB/phpbb/cache/driver/base.php
@@ -177,13 +177,9 @@ abstract class base implements \phpbb\cache\driver\driver_interface
 	*/
 	function remove_file($filename, $check = false)
 	{
-		if (!function_exists('phpbb_is_writable'))
-		{
-			global $phpbb_root_path, $phpEx;
-			include($phpbb_root_path . 'includes/functions.' . $phpEx);
-		}
+		global $phpbb_filesystem;
 
-		if ($check && !phpbb_is_writable($this->cache_dir))
+		if ($check && !$phpbb_filesystem->is_writable($this->cache_dir))
 		{
 			// E_USER_ERROR - not using language entry - intended.
 			trigger_error('Unable to remove files within ' . $this->cache_dir . '. Please check directory permissions.', E_USER_ERROR);
diff --git a/phpBB/phpbb/cache/driver/null.php b/phpBB/phpbb/cache/driver/dummy.php
index 298731ea54..1f74f6dd77 100644
--- a/phpBB/phpbb/cache/driver/null.php
+++ b/phpBB/phpbb/cache/driver/dummy.php
@@ -14,9 +14,9 @@
 namespace phpbb\cache\driver;
 
 /**
-* ACM Null Caching
+* ACM dummy Caching
 */
-class null extends \phpbb\cache\driver\base
+class dummy extends \phpbb\cache\driver\base
 {
 	/**
 	* Set cache path
diff --git a/phpBB/phpbb/cache/driver/file.php b/phpBB/phpbb/cache/driver/file.php
index 32086458ee..bb055d3acf 100644
--- a/phpBB/phpbb/cache/driver/file.php
+++ b/phpBB/phpbb/cache/driver/file.php
@@ -21,6 +21,11 @@ class file extends \phpbb\cache\driver\base
 	var $var_expires = array();
 
 	/**
+	 * @var	\phpbb\filesystem\filesystem_interface
+	 */
+	protected $filesystem;
+
+	/**
 	* Set cache path
 	*
 	* @param string $cache_dir Define the path to the cache directory (default: $phpbb_root_path . 'cache/')
@@ -30,6 +35,7 @@ class file extends \phpbb\cache\driver\base
 		global $phpbb_root_path, $phpbb_container;
 
 		$this->cache_dir = !is_null($cache_dir) ? $cache_dir : $phpbb_root_path . 'cache/' . $phpbb_container->getParameter('core.environment') . '/';
+		$this->filesystem = new \phpbb\filesystem\filesystem();
 
 		if (!is_dir($this->cache_dir))
 		{
@@ -69,14 +75,8 @@ class file extends \phpbb\cache\driver\base
 
 		if (!$this->_write('data_global'))
 		{
-			if (!function_exists('phpbb_is_writable'))
-			{
-				global $phpbb_root_path;
-				include($phpbb_root_path . 'includes/functions.' . $phpEx);
-			}
-
 			// Now, this occurred how often? ... phew, just tell the user then...
-			if (!phpbb_is_writable($this->cache_dir))
+			if (!$this->filesystem->is_writable($this->cache_dir))
 			{
 				// We need to use die() here, because else we may encounter an infinite loop (the message handler calls $cache->unload())
 				die('Fatal: ' . $this->cache_dir . ' is NOT writable.');
@@ -574,13 +574,14 @@ class file extends \phpbb\cache\driver\base
 
 			fclose($handle);
 
-			if (!function_exists('phpbb_chmod'))
+			try
 			{
-				global $phpbb_root_path;
-				include($phpbb_root_path . 'includes/functions.' . $phpEx);
+				$this->filesystem->phpbb_chmod($file, CHMOD_READ | CHMOD_WRITE);
+			}
+			catch (\phpbb\filesystem\exception\filesystem_exception $e)
+			{
+				// Do nothing
 			}
-
-			phpbb_chmod($file, CHMOD_READ | CHMOD_WRITE);
 
 			$return_value = true;
 		}
diff --git a/phpBB/phpbb/cache/driver/memcache.php b/phpBB/phpbb/cache/driver/memcache.php
index 406ab11ddd..caa82fb0b1 100644
--- a/phpBB/phpbb/cache/driver/memcache.php
+++ b/phpBB/phpbb/cache/driver/memcache.php
@@ -50,7 +50,7 @@ class memcache extends \phpbb\cache\driver\memory
 		parent::__construct();
 
 		$this->memcache = new \Memcache;
-		foreach(explode(',', PHPBB_ACM_MEMCACHE) as $u)
+		foreach (explode(',', PHPBB_ACM_MEMCACHE) as $u)
 		{
 			$parts = explode('/', $u);
 			$this->memcache->addServer(trim($parts[0]), trim($parts[1]));