Notice (8): Undefined index: HTTP_ACCEPT_LANGUAGE [APP/Controller/AppController.php, line 53]
Code Context

        // 言語設定
        $locale = locale_accept_from_http($_SERVER['HTTP_ACCEPT_LANGUAGE']);
App\Controller\AppController::initialize() - APP/Controller/AppController.php, line 53
App\Controller\MandalasController::initialize() - APP/Controller/MandalasController.php, line 45
Cake\Controller\Controller::__construct() - CORE/src/Controller/Controller.php, line 262
ReflectionClass::newInstance() - [internal], line ??
Cake\Http\ControllerFactory::create() - CORE/src/Http/ControllerFactory.php, line 79
Cake\Routing\Filter\ControllerFactoryFilter::_getController() - CORE/src/Routing/Filter/ControllerFactoryFilter.php, line 63
Cake\Routing\Filter\ControllerFactoryFilter::beforeDispatch() - CORE/src/Routing/Filter/ControllerFactoryFilter.php, line 49
Cake\Routing\DispatcherFilter::handle() - CORE/src/Routing/DispatcherFilter.php, line 144
Cake\Event\EventManager::_callListener() - CORE/src/Event/EventManager.php, line 426
Cake\Event\EventManager::dispatch() - CORE/src/Event/EventManager.php, line 391
Cake\Http\ActionDispatcher::dispatchEvent() - CORE/src/Event/EventDispatcherTrait.php, line 78
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 80
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 60
require - ROOT/webroot/index.php, line 37
[main] - ROOT/index.php, line 16