Methods with the same name as their class will not be constructors in a future version of PHP; Event_Notification has a deprecated constructor 
in '/www/htdocs/w00d8c70/marketing/wordpress/piwik/libs/Event/Notification.php' at the line 66

#0  Piwik_ErrorHandler(8192, Methods with the same name as their class will not be constructors in a future version of PHP; Event_Notification has a deprecated constructor, /www/htdocs/w00d8c70/marketing/wordpress/piwik/libs/Event/Notification.php, 66, Array ([class] => Event_Notification,[classPath] => Event/Notification,[path] => /www/htdocs/w00d8c70/marketing/wordpress/piwik/libs/Event/Notification.php)) called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/Loader.php:91]
#1  require_once() called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/Loader.php:91]
#2  Piwik_Loader::loadClass(Event_Notification) called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/Loader.php:109]
#3  Piwik_Loader::autoload(Event_Notification)
#4  spl_autoload_call(Event_Notification) called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/PluginsManager.php:631]
#5  require_once(/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/PluginsManager.php) called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/FrontController.php:18]
#6  require_once(/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/FrontController.php) called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/Loader.php:72]
#7  Piwik_Loader::loadClass(Piwik_FrontController) called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/core/Loader.php:109]
#8  Piwik_Loader::autoload(Piwik_FrontController)
#9  spl_autoload_call(Piwik_FrontController) called at [/www/htdocs/w00d8c70/marketing/wordpress/piwik/index.php:56]