Methods with the same name as their class will not be constructors in a future version of PHP; Smarty has a deprecated constructor 
in '/www/htdocs/w01923f0/mister-network.de/analytics/libs/Smarty/Smarty.class.php' at the line 64

#0  Piwik_ErrorHandler(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/Smarty.php:16]
#1  require_once(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/Smarty.php:16]
#2  require_once(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/Loader.php:64]
#3  Piwik_Loader::loadClass(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/Loader.php:96]
#4  Piwik_Loader::autoload(...) called at [:]
#5  spl_autoload_call(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/View.php:37]
#6  Piwik_View->__construct(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/View.php:187]
#7  Piwik_View::clearCompiledTemplates(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/Piwik.php:133]
#8  Piwik::deleteAllCacheOnUpdate(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/plugins/Installation/Controller.php:74]
#9  Piwik_Installation_Controller->welcome(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/plugins/Installation/Installation.php:72]
#10  Piwik_Installation->dispatch(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/libs/Event/Dispatcher.php:213]
#11  Event_Dispatcher->addObserver(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/PluginsManager.php:511]
#12  Piwik_PluginsManager->addPluginObservers(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/PluginsManager.php:384]
#13  Piwik_PluginsManager->reloadPlugins(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/PluginsManager.php:275]
#14  Piwik_PluginsManager->loadPlugins(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/core/FrontController.php:252]
#15  Piwik_FrontController->init(...) called at [/www/htdocs/w01923f0/mister-network.de/analytics/index.php:46]