After update 1.8.4, nothing wortks and the update don’t start.
the message is :
syntax error, unexpected ‘$’ in D:\inetpub\wwwroot\piwik\core\Session.php on line 7
in ‘D:\inetpub\wwwroot\piwik\libs\upgradephp\upgrade.php’ at the line 482
#0 Piwik_ErrorHandler(…) called at [:] #1 parse_ini_file(…) called at [D:\inetpub\wwwroot\piwik\libs\upgradephp\upgrade.php:482] #2 _parse_ini_file(…) called at [D:\inetpub\wwwroot\piwik\core\Config.php:201] #3 Piwik_Config->init(…) called at [D:\inetpub\wwwroot\piwik\core\Piwik.php:2147] #4 Piwik::createConfigObject(…) called at [D:\inetpub\wwwroot\piwik\core\FrontController.php:203] #5 Piwik_FrontController->createConfigObject(…) called at [D:\inetpub\wwwroot\piwik\core\FrontController.php:254] #6 Piwik_FrontController->init(…) called at [D:\inetpub\wwwroot\piwik\index.php:52]
Undefined index: archiving_ranking_query_row_limit
in '[path to piwik]/plugins/Actions/Actions.php' at the line 466
#0 Piwik_ErrorHandler(...) called at [[path to piwik]/plugins/Actions/Actions.php:466]
#1 Piwik_Actions->reloadConfig(...) called at [[path to piwik]/plugins/Actions/Actions.php:445]
#2 Piwik_Actions->__construct(...) called at [[path to piwik]/core/PluginsManager.php:427]
#3 Piwik_PluginsManager->loadPlugin(...) called at [[path to piwik]/core/PluginsManager.php:379]
#4 Piwik_PluginsManager->reloadPlugins(...) called at [[path to piwik]/core/PluginsManager.php:271]
#5 Piwik_PluginsManager->loadPlugins(...) called at [[path to piwik]/core/FrontController.php:291]
#6 Piwik_FrontController->init(...) called at [[path to piwik]/index.php:52]
Manually re-uploading Piwik worked for me. Give it a go as Thomas suggested. Don’t forget to backup your settings.