4 files changed, 11 insertions, 6 deletions
diff --git a/phpBB/phpbb/cache/driver/eaccelerator.php b/phpBB/phpbb/cache/driver/eaccelerator.php
index 1697758acc..740855144f 100644
--- a/phpBB/phpbb/cache/driver/eaccelerator.php
+++ b/phpBB/phpbb/cache/driver/eaccelerator.php
@@ -44,9 +44,11 @@ class eaccelerator extends \phpbb\cache\driver\memory
 	*/
 	function tidy()
 	{
+		global $config;
+
 		eaccelerator_gc();
 
-		set_config('cache_last_gc', time(), true);
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**
diff --git a/phpBB/phpbb/cache/driver/file.php b/phpBB/phpbb/cache/driver/file.php
index 114959c06c..9c63d0010c 100644
--- a/phpBB/phpbb/cache/driver/file.php
+++ b/phpBB/phpbb/cache/driver/file.php
@@ -95,7 +95,7 @@ class file extends \phpbb\cache\driver\base
 	*/
 	function tidy()
 	{
-		global $phpEx;
+		global $config, $phpEx;
 
 		$dir = @opendir($this->cache_dir);
 
@@ -149,7 +149,7 @@ class file extends \phpbb\cache\driver\base
 			}
 		}
 
-		set_config('cache_last_gc', time(), true);
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**
diff --git a/phpBB/phpbb/cache/driver/memory.php b/phpBB/phpbb/cache/driver/memory.php
index 0cef9c3483..baae22d809 100644
--- a/phpBB/phpbb/cache/driver/memory.php
+++ b/phpBB/phpbb/cache/driver/memory.php
@@ -81,9 +81,10 @@ abstract class memory extends \phpbb\cache\driver\base
 	*/
 	function tidy()
 	{
-		// cache has auto GC, no need to have any code here :)
+		global $config;
 
-		set_config('cache_last_gc', time(), true);
+		// cache has auto GC, no need to have any code here :)
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**
diff --git a/phpBB/phpbb/cache/driver/null.php b/phpBB/phpbb/cache/driver/null.php
index a45cf97862..298731ea54 100644
--- a/phpBB/phpbb/cache/driver/null.php
+++ b/phpBB/phpbb/cache/driver/null.php
@@ -52,8 +52,10 @@ class null extends \phpbb\cache\driver\base
 	*/
 	function tidy()
 	{
+		global $config;
+
 		// This cache always has a tidy room.
-		set_config('cache_last_gc', time(), true);
+		$config->set('cache_last_gc', time(), false);
 	}
 
 	/**