From b56467a0c5856a8d5a45c9b21014c526c812c61e Mon Sep 17 00:00:00 2001
From: Ralf Becker <ralfbecker@outdoor-training.de>
Date: Sat, 10 Oct 2015 10:37:07 +0000
Subject: [PATCH] allow to overide egw_server_root used as key in egw_cache for
 tree- AND instance-level

---
 phpgwapi/inc/class.egw_cache.inc.php | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/phpgwapi/inc/class.egw_cache.inc.php b/phpgwapi/inc/class.egw_cache.inc.php
index 682d215374..37285cddc5 100644
--- a/phpgwapi/inc/class.egw_cache.inc.php
+++ b/phpgwapi/inc/class.egw_cache.inc.php
@@ -89,6 +89,13 @@ class egw_cache
 	 */
 	static $max_expiration;
 
+	/**
+	 * Used to determine keys for tree- and instance-level caches
+	 *
+	 * @var string
+	 */
+	static $egw_server_root = EGW_SERVER_ROOT;
+
 	/**
 	 * Set some data in the cache
 	 *
@@ -639,7 +646,7 @@ class egw_cache
 			case self::TREE:
 				if (!isset($tree_key))
 				{
-					$tree_key = $level.'-'.str_replace(array(':','/','\\'),'-',EGW_SERVER_ROOT);
+					$tree_key = $level.'-'.str_replace(array(':','/','\\'),'-', self::$egw_server_root);
 					// add charset to key, if not utf-8 (as everything we store depends on charset!)
 					if (($charset = self::get_system_config('system_charset',false)) && $charset != 'utf-8')
 					{