Use ::class instead of ::className()

- shorter syntax
- native PHP feature, so it does not depend on yii\base\Object
- Does not trigger autoloading anymore

framework/base/Event.php

@@ -64,7 +64,7 @@ class Event extends Object
      * `afterInsert` event:
      *
      * ```php
-     * Event::on(ActiveRecord::className(), ActiveRecord::EVENT_AFTER_INSERT, function ($event) {
+     * Event::on(ActiveRecord::class, ActiveRecord::EVENT_AFTER_INSERT, function ($event) {
      *     Yii::trace(get_class($event->sender) . ' is inserted.');
      * });
      * ```

framework/base/Object.php

@@ -79,6 +79,8 @@ class Object implements Configurable
     /**
      * Returns the fully qualified name of this class.
      * @return string the fully qualified name of this class.
+     * @deprecated since version 2.1. PHPs `::class` syntax should be used instead.
+     * For object instances, use `get_class()`.
      */
     public static function className()
     {

framework/behaviors/AttributeBehavior.php

@@ -29,7 +29,7 @@ use yii\db\ActiveRecord;
  * {
  *     return [
  *         [
- *             'class' => AttributeBehavior::className(),
+ *             'class' => AttributeBehavior::class,
  *             'attributes' => [
  *                 ActiveRecord::EVENT_BEFORE_INSERT => 'attribute1',
  *                 ActiveRecord::EVENT_BEFORE_UPDATE => 'attribute2',

framework/behaviors/BlameableBehavior.php

@@ -21,7 +21,7 @@ use yii\db\BaseActiveRecord;
  * public function behaviors()
  * {
  *     return [
- *         BlameableBehavior::className(),
+ *         BlameableBehavior::class,
  *     ];
  * }
  * ```
@@ -36,7 +36,7 @@ use yii\db\BaseActiveRecord;
  * {
  *     return [
  *         [
- *             'class' => BlameableBehavior::className(),
+ *             'class' => BlameableBehavior::class,
  *             'createdByAttribute' => 'author_id',
  *             'updatedByAttribute' => 'updater_id',
  *         ],

framework/behaviors/SluggableBehavior.php

@@ -25,7 +25,7 @@ use Yii;
  * {
  *     return [
  *         [
- *             'class' => SluggableBehavior::className(),
+ *             'class' => SluggableBehavior::class,
  *             'attribute' => 'title',
  *             // 'slugAttribute' => 'slug',
  *         ],
@@ -42,7 +42,7 @@ use Yii;
  * {
  *     return [
  *         [
- *             'class' => SluggableBehavior::className(),
+ *             'class' => SluggableBehavior::class,
  *             'slugAttribute' => 'alias',
  *         ],
  *     ];
@@ -219,7 +219,7 @@ class SluggableBehavior extends AttributeBehavior
         /* @var $model BaseActiveRecord */
         $validator = Yii::createObject(array_merge(
             [
-                'class' => UniqueValidator::className()
+                'class' => UniqueValidator::class
             ],
             $this->uniqueValidator
         ));

framework/behaviors/TimestampBehavior.php

@@ -21,7 +21,7 @@ use yii\db\BaseActiveRecord;
  * public function behaviors()
  * {
  *     return [
- *         TimestampBehavior::className(),
+ *         TimestampBehavior::class,
  *     ];
  * }
  * ```
@@ -42,7 +42,7 @@ use yii\db\BaseActiveRecord;
  * {
  *     return [
  *         [
- *             'class' => TimestampBehavior::className(),
+ *             'class' => TimestampBehavior::class,
  *             'createdAtAttribute' => 'create_time',
  *             'updatedAtAttribute' => 'update_time',
  *             'value' => new Expression('NOW()'),

framework/caching/DbCache.php

@@ -82,7 +82,7 @@ class DbCache extends Cache
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
     }
 
     /**

framework/caching/DbDependency.php

@@ -47,7 +47,7 @@ class DbDependency extends Dependency
      */
     protected function generateDependencyData($cache)
     {
-        $db = Instance::ensure($this->db, Connection::className());
+        $db = Instance::ensure($this->db, Connection::class);
         if ($this->sql === null) {
             throw new InvalidConfigException('DbDependency::sql must be set.');
         }

framework/captcha/Captcha.php

@@ -50,7 +50,7 @@ use yii\widgets\InputWidget;
  * method, for example like this:
  *
  * ```php
- * <?= $form->field($model, 'captcha')->widget(\yii\captcha\Captcha::classname(), [
+ * <?= $form->field($model, 'captcha')->widget(\yii\captcha\Captcha::class, [
  *     // configure additional widget properties here
  * ]) ?>
  * ```

framework/console/controllers/CacheController.php

@@ -273,6 +273,6 @@ class CacheController extends Controller
      */
     private function isCacheClass($className)
     {
-        return is_subclass_of($className, Cache::className());
+        return is_subclass_of($className, Cache::class);
     }
 }

framework/console/controllers/MigrateController.php

@@ -149,7 +149,7 @@ class MigrateController extends BaseMigrateController
     {
         if (parent::beforeAction($action)) {
             if ($action->id !== 'create') {
-                $this->db = Instance::ensure($this->db, Connection::className());
+                $this->db = Instance::ensure($this->db, Connection::class);
             }
             return true;
         } else {

framework/data/ActiveDataProvider.php

@@ -88,7 +88,7 @@ class ActiveDataProvider extends BaseDataProvider
     {
         parent::init();
         if (is_string($this->db)) {
-            $this->db = Instance::ensure($this->db, Connection::className());
+            $this->db = Instance::ensure($this->db, Connection::class);
         }
     }
 

framework/data/BaseDataProvider.php

@@ -189,7 +189,7 @@ abstract class BaseDataProvider extends Component implements DataProviderInterfa
     public function setPagination($value)
     {
         if (is_array($value)) {
-            $config = ['class' => Pagination::className()];
+            $config = ['class' => Pagination::class];
             if ($this->id !== null) {
                 $config['pageParam'] = $this->id . '-page';
                 $config['pageSizeParam'] = $this->id . '-per-page';
@@ -229,7 +229,7 @@ abstract class BaseDataProvider extends Component implements DataProviderInterfa
     public function setSort($value)
     {
         if (is_array($value)) {
-            $config = ['class' => Sort::className()];
+            $config = ['class' => Sort::class];
             if ($this->id !== null) {
                 $config['sortParam'] = $this->id . '-sort';
             }

framework/data/SqlDataProvider.php

@@ -93,7 +93,7 @@ class SqlDataProvider extends BaseDataProvider
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
         if ($this->sql === null) {
             throw new InvalidConfigException('The "sql" property must be set.');
         }

framework/db/ActiveQuery.php

@@ -660,7 +660,7 @@ class ActiveQuery extends Query implements ActiveQueryInterface
      * ```php
      * public function getActiveUsers()
      * {
-     *     return $this->hasMany(User::className(), ['id' => 'user_id'])
+     *     return $this->hasMany(User::class, ['id' => 'user_id'])
      *                 ->onCondition(['active' => true]);
      * }
      * ```
@@ -730,7 +730,7 @@ class ActiveQuery extends Query implements ActiveQueryInterface
      * ```php
      * public function getItems()
      * {
-     *     return $this->hasMany(Item::className(), ['id' => 'item_id'])
+     *     return $this->hasMany(Item::class, ['id' => 'item_id'])
      *                 ->viaTable('order_item', ['order_id' => 'id']);
      * }
      * ```

framework/db/ActiveRecord.php

@@ -268,7 +268,7 @@ class ActiveRecord extends BaseActiveRecord
      */
     public static function find()
     {
-        return Yii::createObject(ActiveQuery::className(), [get_called_class()]);
+        return Yii::createObject(ActiveQuery::class, [get_called_class()]);
     }
 
     /**

framework/db/ActiveRelationTrait.php

@@ -85,12 +85,12 @@ trait ActiveRelationTrait
      * ```php
      * public function getOrders()
      * {
-     *     return $this->hasOne(Order::className(), ['id' => 'order_id']);
+     *     return $this->hasOne(Order::class, ['id' => 'order_id']);
      * }
      *
      * public function getOrderItems()
      * {
-     *     return $this->hasMany(Item::className(), ['id' => 'item_id'])
+     *     return $this->hasMany(Item::class, ['id' => 'item_id'])
      *                 ->via('orders');
      * }
      * ```
@@ -123,7 +123,7 @@ trait ActiveRelationTrait
      * ```php
      * public function getOrders()
      * {
-     *     return $this->hasMany(Order::className(), ['customer_id' => 'id'])->inverseOf('customer');
+     *     return $this->hasMany(Order::class, ['customer_id' => 'id'])->inverseOf('customer');
      * }
      * ```
      *

framework/db/BaseActiveRecord.php

@@ -319,7 +319,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
      * ```php
      * public function getCountry()
      * {
-     *     return $this->hasOne(Country::className(), ['id' => 'country_id']);
+     *     return $this->hasOne(Country::class, ['id' => 'country_id']);
      * }
      * ```
      *
@@ -360,7 +360,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
      * ```php
      * public function getOrders()
      * {
-     *     return $this->hasMany(Order::className(), ['customer_id' => 'id']);
+     *     return $this->hasMany(Order::class, ['customer_id' => 'id']);
      * }
      * ```
      *

framework/db/Migration.php

@@ -67,7 +67,7 @@ class Migration extends Component implements MigrationInterface
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
         $this->db->getSchema()->refresh();
     }
 

framework/db/Query.php

@@ -164,7 +164,7 @@ class Query extends Component implements QueryInterface
     public function batch($batchSize = 100, $db = null)
     {
         return Yii::createObject([
-            'class' => BatchQueryResult::className(),
+            'class' => BatchQueryResult::class,
             'query' => $this,
             'batchSize' => $batchSize,
             'db' => $db,
@@ -191,7 +191,7 @@ class Query extends Component implements QueryInterface
     public function each($batchSize = 100, $db = null)
     {
         return Yii::createObject([
-            'class' => BatchQueryResult::className(),
+            'class' => BatchQueryResult::class,
             'query' => $this,
             'batchSize' => $batchSize,
             'db' => $db,

framework/di/Instance.php

@@ -91,9 +91,9 @@ class Instance
      * use yii\db\Connection;
      *
      * // returns Yii::$app->db
-     * $db = Instance::ensure('db', Connection::className());
+     * $db = Instance::ensure('db', Connection::class);
      * // returns an instance of Connection using the given configuration
-     * $db = Instance::ensure(['dsn' => 'sqlite:path/to/my.db'], Connection::className());
+     * $db = Instance::ensure(['dsn' => 'sqlite:path/to/my.db'], Connection::class);
      * ```
      *
      * @param object|string|array|static $reference an object or a reference to the desired object.

framework/filters/AccessControl.php

@@ -31,7 +31,7 @@ use yii\web\ForbiddenHttpException;
  * {
  *     return [
  *         'access' => [
- *             'class' => \yii\filters\AccessControl::className(),
+ *             'class' => \yii\filters\AccessControl::class,
  *             'only' => ['create', 'update'],
  *             'rules' => [
  *                 // deny all POST requests
@@ -95,7 +95,7 @@ class AccessControl extends ActionFilter
     public function init()
     {
         parent::init();
-        $this->user = Instance::ensure($this->user, User::className());
+        $this->user = Instance::ensure($this->user, User::class);
         foreach ($this->rules as $i => $rule) {
             if (is_array($rule)) {
                 $this->rules[$i] = Yii::createObject(array_merge($this->ruleConfig, $rule));

framework/filters/Cors.php

@@ -24,7 +24,7 @@ use yii\web\Response;
  * {
  *     return [
  *         'corsFilter' => [
- *             'class' => \yii\filters\Cors::className(),
+ *             'class' => \yii\filters\Cors::class,
  *         ],
  *     ];
  * }
@@ -38,7 +38,7 @@ use yii\web\Response;
  * {
  *     return [
  *         'corsFilter' => [
- *             'class' => \yii\filters\Cors::className(),
+ *             'class' => \yii\filters\Cors::class,
  *             'cors' => [
  *                 // restrict access to
  *                 'Origin' => ['http://www.myserver.com', 'https://www.myserver.com'],

framework/filters/PageCache.php

@@ -148,7 +148,7 @@ class PageCache extends ActionFilter
             return true;
         }
 
-        $this->cache = Instance::ensure($this->cache, Cache::className());
+        $this->cache = Instance::ensure($this->cache, Cache::class);
 
         if (is_array($this->dependency)) {
             $this->dependency = Yii::createObject($this->dependency);

framework/filters/RateLimiter.php

@@ -23,7 +23,7 @@ use yii\web\TooManyRequestsHttpException;
  * {
  *     return [
  *         'rateLimiter' => [
- *             'class' => \yii\filters\RateLimiter::className(),
+ *             'class' => \yii\filters\RateLimiter::class,
  *         ],
  *     ];
  * }

framework/filters/VerbFilter.php

@@ -28,7 +28,7 @@ use yii\web\MethodNotAllowedHttpException;
  * {
  *     return [
  *         'verbs' => [
- *             'class' => \yii\filters\VerbFilter::className(),
+ *             'class' => \yii\filters\VerbFilter::class,
  *             'actions' => [
  *                 'index'  => ['get'],
  *                 'view'   => ['get'],

framework/filters/auth/CompositeAuth.php

@@ -23,10 +23,10 @@ use yii\base\InvalidConfigException;
  * {
  *     return [
  *         'compositeAuth' => [
- *             'class' => \yii\filters\auth\CompositeAuth::className(),
+ *             'class' => \yii\filters\auth\CompositeAuth::class,
  *             'authMethods' => [
- *                 \yii\filters\auth\HttpBasicAuth::className(),
- *                 \yii\filters\auth\QueryParamAuth::className(),
+ *                 \yii\filters\auth\HttpBasicAuth::class,
+ *                 \yii\filters\auth\QueryParamAuth::class,
  *             ],
  *         ],
  *     ];

framework/filters/auth/HttpBasicAuth.php

@@ -17,7 +17,7 @@ namespace yii\filters\auth;
  * {
  *     return [
  *         'basicAuth' => [
- *             'class' => \yii\filters\auth\HttpBasicAuth::className(),
+ *             'class' => \yii\filters\auth\HttpBasicAuth::class,
  *         ],
  *     ];
  * }

framework/filters/auth/HttpBearerAuth.php

@@ -17,7 +17,7 @@ namespace yii\filters\auth;
  * {
  *     return [
  *         'bearerAuth' => [
- *             'class' => \yii\filters\auth\HttpBearerAuth::className(),
+ *             'class' => \yii\filters\auth\HttpBearerAuth::class,
  *         ],
  *     ];
  * }

framework/grid/ActionColumn.php

@@ -21,7 +21,7 @@ use yii\helpers\Url;
  * 'columns' => [
  *     // ...
  *     [
- *         'class' => ActionColumn::className(),
+ *         'class' => ActionColumn::class,
  *         // you may configure additional properties here
  *     ],
  * ]

framework/grid/GridView.php

@@ -141,14 +141,14 @@ class GridView extends BaseListView
      *
      * ```php
      * [
-     *     ['class' => SerialColumn::className()],
+     *     ['class' => SerialColumn::class],
      *     [
-     *         'class' => DataColumn::className(), // this line is optional
+     *         'class' => DataColumn::class, // this line is optional
      *         'attribute' => 'name',
      *         'format' => 'text',
      *         'label' => 'Name',
      *     ],
-     *     ['class' => CheckboxColumn::className()],
+     *     ['class' => CheckboxColumn::class],
      * ]
      * ```
      *
@@ -526,7 +526,7 @@ class GridView extends BaseListView
                 $column = $this->createDataColumn($column);
             } else {
                 $column = Yii::createObject(array_merge([
-                    'class' => $this->dataColumnClass ? : DataColumn::className(),
+                    'class' => $this->dataColumnClass ? : DataColumn::class,
                     'grid' => $this,
                 ], $column));
             }
@@ -551,7 +551,7 @@ class GridView extends BaseListView
         }
 
         return Yii::createObject([
-            'class' => $this->dataColumnClass ? : DataColumn::className(),
+            'class' => $this->dataColumnClass ? : DataColumn::class,
             'grid' => $this,
             'attribute' => $matches[1],
             'format' => isset($matches[3]) ? $matches[3] : 'text',

framework/i18n/DbMessageSource.php

@@ -90,9 +90,9 @@ class DbMessageSource extends MessageSource
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
         if ($this->enableCaching) {
-            $this->cache = Instance::ensure($this->cache, Cache::className());
+            $this->cache = Instance::ensure($this->cache, Cache::class);
         }
     }
 

framework/log/DbTarget.php

@@ -52,7 +52,7 @@ class DbTarget extends Target
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
     }
 
     /**

framework/mail/BaseMailer.php

@@ -140,7 +140,7 @@ abstract class BaseMailer extends Component implements MailerInterface, ViewCont
     protected function createView(array $config)
     {
         if (!array_key_exists('class', $config)) {
-            $config['class'] = View::className();
+            $config['class'] = View::class;
         }
 
         return Yii::createObject($config);

framework/mutex/DbMutex.php

@@ -38,6 +38,6 @@ abstract class DbMutex extends Mutex
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
     }
 }

framework/rbac/DbManager.php

@@ -107,9 +107,9 @@ class DbManager extends BaseManager
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
         if ($this->cache !== null) {
-            $this->cache = Instance::ensure($this->cache, Cache::className());
+            $this->cache = Instance::ensure($this->cache, Cache::class);
         }
     }
 
@@ -431,7 +431,7 @@ class DbManager extends BaseManager
      */
     protected function populateItem($row)
     {
-        $class = $row['type'] == Item::TYPE_PERMISSION ? Permission::className() : Role::className();
+        $class = $row['type'] == Item::TYPE_PERMISSION ? Permission::class : Role::class;
 
         if (!isset($row['data']) || ($data = @unserialize($row['data'])) === false) {
             $data = null;

framework/rbac/PhpManager.php

@@ -691,7 +691,7 @@ class PhpManager extends BaseManager
         $rules = $this->loadFromFile($this->ruleFile);
 
         foreach ($items as $name => $item) {
-            $class = $item['type'] == Item::TYPE_PERMISSION ? Permission::className() : Role::className();
+            $class = $item['type'] == Item::TYPE_PERMISSION ? Permission::class : Role::class;
 
             $this->items[$name] = new $class([
                 'name' => $name,

framework/rest/Controller.php

@@ -47,21 +47,21 @@ class Controller extends \yii\web\Controller
     {
         return [
             'contentNegotiator' => [
-                'class' => ContentNegotiator::className(),
+                'class' => ContentNegotiator::class,
                 'formats' => [
                     'application/json' => Response::FORMAT_JSON,
                     'application/xml' => Response::FORMAT_XML,
                 ],
             ],
             'verbFilter' => [
-                'class' => VerbFilter::className(),
+                'class' => VerbFilter::class,
                 'actions' => $this->verbs(),
             ],
             'authenticator' => [
-                'class' => CompositeAuth::className(),
+                'class' => CompositeAuth::class,
             ],
             'rateLimiter' => [
-                'class' => RateLimiter::className(),
+                'class' => RateLimiter::class,
             ],
         ];
     }

framework/test/DbFixture.php

@@ -37,6 +37,6 @@ abstract class DbFixture extends Fixture
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Object::className());
+        $this->db = Instance::ensure($this->db, Object::class);
     }
 }

framework/test/FixtureTrait.php

@@ -40,12 +40,12 @@ trait FixtureTrait
      * ```php
      * [
      *     // anonymous fixture
-     *     PostFixture::className(),
+     *     PostFixture::class,
      *     // "users" fixture
-     *     'users' => UserFixture::className(),
+     *     'users' => UserFixture::class,
      *     // "cache" fixture with configuration
      *     'cache' => [
-     *          'class' => CacheFixture::className(),
+     *          'class' => CacheFixture::class,
      *          'host' => 'xxx',
      *     ],
      * ]

framework/validators/UniqueValidator.php

@@ -106,7 +106,7 @@ class UniqueValidator extends Validator
             $query->andWhere($this->filter);
         }
 
-        if (!$model instanceof ActiveRecordInterface || $model->getIsNewRecord() || $model->className() !== $targetClass::className()) {
+        if (!$model instanceof ActiveRecordInterface || $model->getIsNewRecord() || get_class($model) !== $targetClass::class) {
             // if current $model isn't in the database yet then it's OK just to call exists()
             // also there's no need to run check based on primary keys, when $targetClass is not the same as $model's class
             $exists = $query->exists();

framework/web/AssetManager.php

@@ -371,10 +371,10 @@ class AssetManager extends Component
     public function getConverter()
     {
         if ($this->_converter === null) {
-            $this->_converter = Yii::createObject(AssetConverter::className());
+            $this->_converter = Yii::createObject(AssetConverter::class);
         } elseif (is_array($this->_converter) || is_string($this->_converter)) {
             if (is_array($this->_converter) && !isset($this->_converter['class'])) {
-                $this->_converter['class'] = AssetConverter::className();
+                $this->_converter['class'] = AssetConverter::class;
             }
             $this->_converter = Yii::createObject($this->_converter);
         }

framework/web/CacheSession.php

@@ -56,7 +56,7 @@ class CacheSession extends Session
     public function init()
     {
         parent::init();
-        $this->cache = Instance::ensure($this->cache, Cache::className());
+        $this->cache = Instance::ensure($this->cache, Cache::class);
     }
 
     /**

framework/web/DbSession.php

@@ -83,7 +83,7 @@ class DbSession extends MultiFieldSession
     public function init()
     {
         parent::init();
-        $this->db = Instance::ensure($this->db, Connection::className());
+        $this->db = Instance::ensure($this->db, Connection::class);
     }
 
     /**

framework/widgets/ActiveField.php

@@ -653,7 +653,7 @@ class ActiveField extends Component
      * the following code, assuming that `$form` is your [[ActiveForm]] instance:
      *
      * ```php
-     * $form->field($model, 'date')->widget(\yii\widgets\MaskedInput::className(), [
+     * $form->field($model, 'date')->widget(\yii\widgets\MaskedInput::class, [
      *     'mask' => '99/99/9999',
      * ]);
      * ```

framework/widgets/BaseListView.php

@@ -237,7 +237,7 @@ abstract class BaseListView extends Widget
         }
         /* @var $class LinkPager */
         $pager = $this->pager;
-        $class = ArrayHelper::remove($pager, 'class', LinkPager::className());
+        $class = ArrayHelper::remove($pager, 'class', LinkPager::class);
         $pager['pagination'] = $pagination;
         $pager['view'] = $this->getView();
 
@@ -256,7 +256,7 @@ abstract class BaseListView extends Widget
         }
         /* @var $class LinkSorter */
         $sorter = $this->sorter;
-        $class = ArrayHelper::remove($sorter, 'class', LinkSorter::className());
+        $class = ArrayHelper::remove($sorter, 'class', LinkSorter::class);
         $sorter['sort'] = $sort;
         $sorter['view'] = $this->getView();
 

framework/widgets/FragmentCache.php

@@ -84,7 +84,7 @@ class FragmentCache extends Widget
     {
         parent::init();
 
-        $this->cache = $this->enabled ? Instance::ensure($this->cache, Cache::className()) : null;
+        $this->cache = $this->enabled ? Instance::ensure($this->cache, Cache::class) : null;
 
         if ($this->cache instanceof Cache && $this->getCachedContent() === false) {
             $this->getView()->cacheStack[] = $this;

framework/widgets/MaskedInput.php

@@ -33,7 +33,7 @@ use yii\web\View;
  * method, for example like this:
  *
  * ```php
- * <?= $form->field($model, 'from_date')->widget(\yii\widgets\MaskedInput::className(), [
+ * <?= $form->field($model, 'from_date')->widget(\yii\widgets\MaskedInput::class, [
  *     'mask' => '999-999-9999',
  * ]) ?>
  * ```