[6.x] Removes debugbar preferences and registration

CHANGELOG-WIP.md

@@ -3,6 +3,7 @@
 ### Development
 - Reference tags now support fallback values when no attribute is specified. ([#17688](https://github.com/craftcms/cms/pull/17688))
 - Deprecated support for categories, global sets, and tags. ([#18009](https://github.com/craftcms/cms/pull/18009))
+- Removed support for the Debug Toolbar. [Laravel Debugbar](https://laraveldebugbar.com) can be used instead. ([#18812](https://github.com/craftcms/cms/pull/18812))
 
 ### Extensibility
 - Added `CraftCms\Cms\Support\Arr`.

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Added support for Symfony-style array config files in `config/craft/sanitizers/`. ([#18808](https://github.com/craftcms/cms/pull/18808))
 - The `craftAsset()` Twig function now resolves to Vite versioned assets. ([#18801](https://github.com/craftcms/cms/pull/18801))
 - Deprecated the `csrfTokenName`, `enableCsrfCookie`, and `enableCsrfProtection` general config settings. ([#18806](https://github.com/craftcms/cms/pull/18806))
+- Removed support for the Debug Toolbar. [Laravel Debugbar](https://laraveldebugbar.com) can be used instead. ([#18812](https://github.com/craftcms/cms/pull/18812))
 - Fixed a PHP error that occurred when saving a Structure section with a Max Levels value. ([#18809](https://github.com/craftcms/cms/issues/18809))
 
 ## 6.0.0-alpha.1 - 2026-05-06

resources/templates/users/_preferences.twig

@@ -194,24 +194,6 @@
         },
       ],
     }) }}
-
-    {{ forms.checkboxGroupField({
-      label: 'Debug Toolbar'|t('app'),
-      options: [
-        {
-          label: 'Show the debug toolbar on the front end'|t('app'),
-          name: 'enableDebugToolbarForSite',
-          id: 'enableDebugToolbarForSite',
-          checked: Auth.user.getPreference('enableDebugToolbarForSite')
-        },
-        {
-          label: 'Show the debug toolbar in the control panel'|t('app'),
-          name: 'enableDebugToolbarForCp',
-          id: 'enableDebugToolbarForCp',
-          checked: Auth.user.getPreference('enableDebugToolbarForCp')
-        },
-      ],
-    }) }}
   </div>
 {% endif %}
 

src/Http/Controllers/Users/PreferencesController.php

@@ -81,8 +81,6 @@ public function store(Request $request, Users $users): Response
         if ($user->admin) {
             $preferences = array_merge($preferences, [
                 'showFieldHandles' => (bool) $request->input('showFieldHandles', $user->getPreference('showFieldHandles')),
-                'enableDebugToolbarForSite' => (bool) $request->input('enableDebugToolbarForSite', $user->getPreference('enableDebugToolbarForSite')),
-                'enableDebugToolbarForCp' => (bool) $request->input('enableDebugToolbarForCp', $user->getPreference('enableDebugToolbarForCp')),
                 'showExceptionView' => (bool) $request->input('showExceptionView', $user->getPreference('showExceptionView')),
                 'profileTemplates' => (bool) $request->input('profileTemplates', $user->getPreference('profileTemplates')),
             ]);

tests/Feature/Http/Controllers/User/PreferencesControllerTest.php

@@ -95,24 +95,17 @@
     /** @var User $user */
     $user = auth()->user();
 
-    // Admin users can set these preferences
-    // The user in tests should already be an admin
     if (! $user->admin) {
         $this->markTestSkipped('User must be admin for this test');
     }
 
     postJson(action([PreferencesController::class, 'store'], [
         'showFieldHandles' => true,
-        'enableDebugToolbarForSite' => true,
-        'enableDebugToolbarForCp' => true,
         'showExceptionView' => true,
         'profileTemplates' => true,
     ]))->assertOk();
 
-    // Verify preferences were saved (admin-only preferences)
     expect($user->getPreference('showFieldHandles'))->toBeTrue();
-    expect($user->getPreference('enableDebugToolbarForSite'))->toBeTrue();
-    expect($user->getPreference('enableDebugToolbarForCp'))->toBeTrue();
     expect($user->getPreference('showExceptionView'))->toBeTrue();
     expect($user->getPreference('profileTemplates'))->toBeTrue();
 });

yii2-adapter/legacy/web/Application.php

@@ -7,32 +7,23 @@
 
 namespace craft\web;
 
-use Craft;
 use craft\base\ApplicationTrait;
-use craft\debug\DeprecatedPanel;
-use craft\debug\DumpPanel;
-use craft\debug\Module as DebugModule;
-use craft\debug\RequestPanel;
-use craft\debug\UserPanel;
 use craft\errors\ExitException;
 use craft\helpers\App;
 use craft\helpers\FileHelper;
 use craft\queue\QueueLogBehavior;
 use CraftCms\Aliases\Aliases;
 use CraftCms\Cms\Cms;
 use CraftCms\Cms\Plugin\Plugins;
-use CraftCms\Cms\Support\Typecast;
 use CraftCms\Cms\Support\Url;
 use CraftCms\Yii2Adapter\Web\Response as IlluminateBridgeResponse;
 use Illuminate\Contracts\Http\Kernel;
 use Illuminate\Http\Request as IlluminateRequest;
 use Illuminate\Support\Facades\Auth;
-use Illuminate\Support\Facades\Config;
 use Illuminate\Support\Facades\Gate;
 use Illuminate\Support\Facades\Log;
 use IntlDateFormatter;
 use IntlException;
-use ReflectionClass;
 use Symfony\Component\HttpFoundation\Response as SymfonyResponse;
 use Throwable;
 use yii\base\Component;
@@ -42,13 +33,6 @@
 use yii\base\InvalidArgumentException;
 use yii\base\InvalidConfigException;
 use yii\base\InvalidRouteException;
-use yii\debug\Module as YiiDebugModule;
-use yii\debug\panels\AssetPanel;
-use yii\debug\panels\DbPanel;
-use yii\debug\panels\LogPanel;
-use yii\debug\panels\MailPanel;
-use yii\debug\panels\ProfilingPanel;
-use yii\debug\panels\RouterPanel;
 use yii\web\BadRequestHttpException;
 use yii\web\NotFoundHttpException;
 use yii\web\Response as BaseResponse;
@@ -116,8 +100,6 @@ public function init(): void
 
         // Process resource requests before we do anything to establish the user session
         $this->_processResourceRequest();
-
-        $this->debugBootstrap();
     }
 
     /**
@@ -225,12 +207,7 @@ public function handleRequest($request, bool $skipSpecialHandling = false): Base
         }
 
         // If we’re still here, finally let Yii do its thing.
-        try {
-            return parent::handleRequest($request);
-        } catch (Throwable $e) {
-            $this->_unregisterDebugModule();
-            throw $e;
-        }
+        return parent::handleRequest($request);
     }
 
     /**
@@ -363,81 +340,6 @@ protected function ensureResourcePathExists(): void
         }
     }
 
-    /**
-     * Bootstraps the Debug Toolbar if necessary.
-     */
-    protected function debugBootstrap(): void
-    {
-        $request = $this->getRequest();
-
-        if ($request->getIsLivePreview() || $request->getIsPreview()) {
-            return;
-        }
-
-        // Only load the debug toolbar if it's enabled for the user, or Dev Mode is enabled and the request wants it
-        $user = Auth::user();
-        $pref = $request->getIsCpRequest() ? 'enableDebugToolbarForCp' : 'enableDebugToolbarForSite';
-        if (!(
-            ($user && $user->admin && $user->getPreference($pref)) ||
-            (app()->hasDebugModeEnabled() && $request->getHeaders()->get('X-Debug') === 'enable')
-        )) {
-            return;
-        }
-
-        $svg = rawurlencode(file_get_contents(dirname(__DIR__) . '/icons/custom-icons/c-debug.svg'));
-        DebugModule::setYiiLogo("data:image/svg+xml;charset=utf-8,$svg");
-
-        // Determine the base path using reflection in case it wasn't loaded from @vendor
-        $ref = new ReflectionClass(YiiDebugModule::class);
-        $basePath = dirname($ref->getFileName());
-
-        $this->setModule('debug', [
-            'class' => DebugModule::class,
-            'basePath' => $basePath,
-            'allowedIPs' => ['*'],
-            'panels' => [
-                'config' => false,
-                'user' => UserPanel::class,
-                'router' => [
-                    'class' => RouterPanel::class,
-                    'categories' => [
-                        UrlManager::class . '::_getMatchedElementRoute',
-                        UrlManager::class . '::_getMatchedUrlRoute',
-                        UrlManager::class . '::_getTemplateRoute',
-                        UrlManager::class . '::_getTokenRoute',
-                    ],
-                ],
-                'request' => RequestPanel::class,
-                'log' => LogPanel::class,
-                'dump' => DumpPanel::class,
-                'deprecated' => DeprecatedPanel::class,
-                'profiling' => ProfilingPanel::class,
-                'db' => DbPanel::class,
-                'asset' => AssetPanel::class,
-                'mail' => MailPanel::class,
-            ],
-        ]);
-        /** @var DebugModule $module */
-        $module = $this->getModule('debug');
-        $module->bootstrap($this);
-
-        if ($config = Config::get('craft.debug', [])) {
-            Typecast::configure($module, $config);
-        }
-    }
-
-    /**
-     * Unregisters the Debug module's end body event.
-     */
-    private function _unregisterDebugModule(): void
-    {
-        $debug = $this->getModule('debug', false);
-
-        if ($debug !== null) {
-            $this->getView()->off(View::EVENT_END_BODY, [$debug, 'renderToolbar']);
-        }
-    }
-
     /**
      * Processes resource requests.
      *
@@ -492,10 +394,6 @@ private function _processInstallRequest(Request $request): ?BaseResponse
         $isCpRequest = $request->getIsCpRequest();
         $isInstalled = Cms::isInstalled();
 
-        if (!$isInstalled) {
-            $this->_unregisterDebugModule();
-        }
-
         // Are they requesting the installer?
         if ($isCpRequest && $request->getSegment(1) === 'install') {
             // Is Craft already installed?
@@ -560,7 +458,6 @@ private function _processActionRequest(Request $request): ?BaseResponse
                     ? ($response ?? $this->getResponse())
                     : $response;
             } catch (Throwable $e) {
-                $this->_unregisterDebugModule();
                 if ($e instanceof InvalidRouteException) {
                     throw new NotFoundHttpException(t('Page not found.'), $e->getCode(), $e);
                 }