PHP 7.x - compatibility, Doku_Event_Handler
Created by: TomNedry
After changing from PHP 5.4.2 to PHP 7.2 i got this error:
Declaration of action_plugin_piwik2::register(&$controller) should be compatible with DokuWiki_Action_Plugin::register(Doku_Event_Handler $controller) in [...]/action.php at line 29.
This is because of the use of "&$controller" in line 17
function register(&$controller) {
instead of using "Doku_Event_Handler $controller"
function register(Doku_Event_Handler $controller) {