use older php array syntax in index.php

index.php

@@ -40,7 +40,7 @@ try {
 	OC::handleRequest();
 
 } catch(\OC\ServiceUnavailableException $ex) {
-	\OC::$server->getLogger()->logException($ex, ['app' => 'index']);
+	\OC::$server->getLogger()->logException($ex, array('app' => 'index'));
 
 	//show the user a detailed error page
 	OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
@@ -49,13 +49,13 @@ try {
 	OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
 	OC_Template::printErrorPage($ex->getMessage(), $ex->getHint());
 } catch (Exception $ex) {
-	\OC::$server->getLogger()->logException($ex, ['app' => 'index']);
+	\OC::$server->getLogger()->logException($ex, array('app' => 'index'));
 
 	//show the user a detailed error page
 	OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);
 	OC_Template::printExceptionErrorPage($ex);
 } catch (Error $ex) {
-	\OC::$server->getLogger()->logException($ex, ['app' => 'index']);
+	\OC::$server->getLogger()->logException($ex, array('app' => 'index'));
 	OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);
 	OC_Template::printExceptionErrorPage($ex);
 }