diff --git a/framework/console/controllers/BaseMigrateController.php b/framework/console/controllers/BaseMigrateController.php
index 33e65ee..6f93bdd 100644
--- a/framework/console/controllers/BaseMigrateController.php
+++ b/framework/console/controllers/BaseMigrateController.php
@@ -890,7 +890,7 @@ abstract class BaseMigrateController extends Controller
 
         $migrations = [];
         foreach ($migrationPaths as $item) {
-            list($migrationPath, $namespace) = $item;
+            [$migrationPath, $namespace] = $item;
             if (!file_exists($migrationPath)) {
                 continue;
             }
diff --git a/framework/db/ActiveQuery.php b/framework/db/ActiveQuery.php
index 5122982..454338e 100644
--- a/framework/db/ActiveQuery.php
+++ b/framework/db/ActiveQuery.php
@@ -609,8 +609,8 @@ class ActiveQuery extends Query implements ActiveQueryInterface
             return;
         }
 
-        list($parentTable, $parentAlias) = $parent->getTableNameAndAlias();
-        list($childTable, $childAlias) = $child->getTableNameAndAlias();
+        [$parentTable, $parentAlias] = $parent->getTableNameAndAlias();
+        [$childTable, $childAlias] = $child->getTableNameAndAlias();
 
         if (!empty($child->link)) {
             if (strpos($parentAlias, '{{') === false) {
@@ -785,7 +785,7 @@ class ActiveQuery extends Query implements ActiveQueryInterface
     public function alias($alias)
     {
         if (empty($this->from) || count($this->from) < 2) {
-            list($tableName) = $this->getTableNameAndAlias();
+            [$tableName] = $this->getTableNameAndAlias();
             $this->from = [$alias => $tableName];
         } else {
             $tableName = $this->getPrimaryTableName();
diff --git a/framework/db/Command.php b/framework/db/Command.php
index f618144..e7cbdec 100644
--- a/framework/db/Command.php
+++ b/framework/db/Command.php
@@ -990,7 +990,7 @@ class Command extends Component
     public function execute()
     {
         $sql = $this->getSql();
-        list($profile, $rawSql) = $this->logQuery(__METHOD__);
+        [$profile, $rawSql] = $this->logQuery(__METHOD__);
 
         if ($sql == '') {
             return 0;
@@ -1046,7 +1046,7 @@ class Command extends Component
      */
     protected function queryInternal($method, $fetchMode = null)
     {
-        list($profile, $rawSql) = $this->logQuery('yii\db\Command::query');
+        [$profile, $rawSql] = $this->logQuery('yii\db\Command::query');
 
         if ($method !== '') {
             $info = $this->db->getQueryCacheInfo($this->queryCacheDuration, $this->queryCacheDependency);
diff --git a/framework/db/Query.php b/framework/db/Query.php
index f82827a..61d8c98 100644
--- a/framework/db/Query.php
+++ b/framework/db/Query.php
@@ -527,7 +527,7 @@ $
 PATTERN;
                 if (preg_match($pattern, $tableName, $matches)) {
                     if (isset($matches[2])) {
-                        list(, $tableName, $alias) = $matches;
+                        [, $tableName, $alias] = $matches;
                     } else {
                         $tableName = $alias = $matches[1];
                     }
diff --git a/framework/db/oci/QueryBuilder.php b/framework/db/oci/QueryBuilder.php
index 75726ca..cb683a9 100644
--- a/framework/db/oci/QueryBuilder.php
+++ b/framework/db/oci/QueryBuilder.php
@@ -369,7 +369,7 @@ EOD;
             throw new Exception("Operator '$operator' requires two operands.");
         }
 
-        list($column, $values) = $operands;
+        [$column, $values] = $operands;
 
         if ($values instanceof \Traversable) {
             $values = iterator_to_array($values);
diff --git a/framework/db/sqlite/Command.php b/framework/db/sqlite/Command.php
index 81de0ba..c66dc3d 100644
--- a/framework/db/sqlite/Command.php
+++ b/framework/db/sqlite/Command.php
@@ -34,7 +34,7 @@ class Command extends \yii\db\Command
 
         $result = null;
         foreach ($statements as $statement) {
-            list($statementSql, $statementParams) = $statement;
+            [$statementSql, $statementParams] = $statement;
             $this->setSql($statementSql)->bindValues($statementParams);
             $result = parent::execute();
         }
@@ -54,9 +54,9 @@ class Command extends \yii\db\Command
             return parent::queryInternal($method, $fetchMode);
         }
 
-        list($lastStatementSql, $lastStatementParams) = array_pop($statements);
+        [$lastStatementSql, $lastStatementParams] = array_pop($statements);
         foreach ($statements as $statement) {
-            list($statementSql, $statementParams) = $statement;
+            [$statementSql, $statementParams] = $statement;
             $this->setSql($statementSql)->bindValues($statementParams);
             parent::execute();
         }
diff --git a/framework/filters/auth/HttpBasicAuth.php b/framework/filters/auth/HttpBasicAuth.php
index 64c9b1d..3654717 100644
--- a/framework/filters/auth/HttpBasicAuth.php
+++ b/framework/filters/auth/HttpBasicAuth.php
@@ -91,7 +91,7 @@ class HttpBasicAuth extends AuthMethod
      */
     public function authenticate($user, $request, $response)
     {
-        list($username, $password) = $request->getAuthCredentials();
+        [$username, $password] = $request->getAuthCredentials();
 
         if ($this->auth) {
             if ($username !== null || $password !== null) {
diff --git a/framework/filters/auth/HttpHeaderAuth.php b/framework/filters/auth/HttpHeaderAuth.php
index ab4f06f..8808a3c 100644
--- a/framework/filters/auth/HttpHeaderAuth.php
+++ b/framework/filters/auth/HttpHeaderAuth.php
@@ -17,7 +17,7 @@ namespace yii\filters\auth;
  * {
  *     return [
  *         'basicAuth' => [
- *             'class' => \yii\filters\auth\HttpHeaderAuth::className(),
+ *             'class' => \yii\filters\auth\HttpHeaderAuth::class,
  *         ],
  *     ];
  * }
@@ -37,18 +37,18 @@ class HttpHeaderAuth extends AuthMethod
      * @var string the HTTP header name
      */
     public $header = 'X-Api-Key';
-
     /**
      * @var string a pattern to use to extract the HTTP authentication value
      */
     public $pattern;
 
+
     /**
      * @inheritdoc
      */
     public function authenticate($user, $request, $response)
     {
-        $authHeader = $request->getHeaders()->get($this->header);
+        $authHeader = $request->getHeaderLine('Authorization');
 
         if ($authHeader !== null) {
             if ($this->pattern !== null && preg_match($this->pattern, $authHeader, $matches)) {
diff --git a/framework/helpers/BaseIpHelper.php b/framework/helpers/BaseIpHelper.php
index 74df866..3a4c35f 100644
--- a/framework/helpers/BaseIpHelper.php
+++ b/framework/helpers/BaseIpHelper.php
@@ -59,8 +59,8 @@ class BaseIpHelper
      */
     public static function inRange($subnet, $range)
     {
-        list($ip, $mask) = array_pad(explode('/', $subnet), 2, null);
-        list($net, $netMask) = array_pad(explode('/', $range), 2, null);
+        [$ip, $mask] = array_pad(explode('/', $subnet), 2, null);
+        [$net, $netMask] = array_pad(explode('/', $range), 2, null);
 
         $ipVersion = static::getIpVersion($ip);
         $netVersion = static::getIpVersion($net);
diff --git a/framework/i18n/Formatter.php b/framework/i18n/Formatter.php
index be7d0bb..e7f612b 100644
--- a/framework/i18n/Formatter.php
+++ b/framework/i18n/Formatter.php
@@ -725,7 +725,7 @@ class Formatter extends Component
         $timeZone = $this->timeZone;
         // avoid time zone conversion for date-only and time-only values
         if ($type === 'date' || $type === 'time') {
-            list($timestamp, $hasTimeInfo, $hasDateInfo) = $this->normalizeDatetimeValue($value, true);
+            [$timestamp, $hasTimeInfo, $hasDateInfo] = $this->normalizeDatetimeValue($value, true);
             if ($type === 'date' && !$hasTimeInfo || $type === 'time' && !$hasDateInfo) {
                 $timeZone = $this->defaultTimeZone;
             }
@@ -1527,7 +1527,7 @@ class Formatter extends Component
 
         $multipliers = array_values($this->measureUnits[$unitType][$unitSystem]);
 
-        list($params, $position) = $this->formatNumber(
+        [$params, $position] = $this->formatNumber(
             $this->normalizeNumericValue($value) * $baseUnit,
             $decimals,
             null,
diff --git a/framework/widgets/FragmentCache.php b/framework/widgets/FragmentCache.php
index 7d49c0d..1ccf3d2 100644
--- a/framework/widgets/FragmentCache.php
+++ b/framework/widgets/FragmentCache.php
@@ -152,7 +152,7 @@ class FragmentCache extends Widget
             return $this->_content;
         }
 
-        list($this->_content, $placeholders) = $data;
+        [$this->_content, $placeholders] = $data;
         if (!is_array($placeholders) || count($placeholders) === 0) {
             return $this->_content;
         }
diff --git a/tests/framework/base/EventTest.php b/tests/framework/base/EventTest.php
index fffe477..d076ecc 100644
--- a/tests/framework/base/EventTest.php
+++ b/tests/framework/base/EventTest.php
@@ -97,7 +97,7 @@ class EventTest extends TestCase
      */
     public function testOnWildcard()
     {
-        Event::on(Post::className(), '*', function ($event) {
+        Event::on(Post::class, '*', function ($event) {
             $this->counter += 1;
         });
         Event::on('*\Post', 'save', function ($event) {
@@ -108,7 +108,7 @@ class EventTest extends TestCase
         $post->save();
         $this->assertEquals(4, $this->counter);
 
-        $this->assertTrue(Event::hasHandlers(Post::className(), 'save'));
+        $this->assertTrue(Event::hasHandlers(Post::class, 'save'));
     }
 
     /**
@@ -120,11 +120,11 @@ class EventTest extends TestCase
         $handler = function ($event) {
             $this->counter++;
         };
-        $this->assertFalse(Event::hasHandlers(Post::className(), 'save'));
+        $this->assertFalse(Event::hasHandlers(Post::class, 'save'));
         Event::on('*\Post', 'save', $handler);
-        $this->assertTrue(Event::hasHandlers(Post::className(), 'save'));
+        $this->assertTrue(Event::hasHandlers(Post::class, 'save'));
         Event::off('*\Post', 'save', $handler);
-        $this->assertFalse(Event::hasHandlers(Post::className(), 'save'));
+        $this->assertFalse(Event::hasHandlers(Post::class, 'save'));
     }
 }
 
diff --git a/tests/framework/base/ModuleTest.php b/tests/framework/base/ModuleTest.php
index 83a9a0c..d436b60 100644
--- a/tests/framework/base/ModuleTest.php
+++ b/tests/framework/base/ModuleTest.php
@@ -127,25 +127,25 @@ class ModuleTest extends TestCase
         $module->controllerNamespace = 'yiiunit\framework\base';
 
         $route = 'module-test';
-        $this->assertInstanceOf(ModuleTestController::className(), $module->createControllerByID($route));
+        $this->assertInstanceOf(ModuleTestController::class, $module->createControllerByID($route));
 
         $route = 'module-test-';
-        $this->assertNotInstanceOf(ModuleTestController::className(), $module->createControllerByID($route));
+        $this->assertNotInstanceOf(ModuleTestController::class, $module->createControllerByID($route));
 
         $route = '-module-test';
-        $this->assertNotInstanceOf(ModuleTestController::className(), $module->createControllerByID($route));
+        $this->assertNotInstanceOf(ModuleTestController::class, $module->createControllerByID($route));
 
         $route = 'very-complex-name-test';
-        $this->assertInstanceOf(VeryComplexNameTestController::className(), $module->createControllerByID($route));
+        $this->assertInstanceOf(VeryComplexNameTestController::class, $module->createControllerByID($route));
 
         $route = 'very-complex-name-test--';
-        $this->assertNotInstanceOf(VeryComplexNameTestController::className(), $module->createControllerByID($route));
+        $this->assertNotInstanceOf(VeryComplexNameTestController::class, $module->createControllerByID($route));
 
         $route = '--very-complex-name-test';
-        $this->assertNotInstanceOf(VeryComplexNameTestController::className(), $module->createControllerByID($route));
+        $this->assertNotInstanceOf(VeryComplexNameTestController::class, $module->createControllerByID($route));
 
         $route = 'very---complex---name---test';
-        $this->assertNotInstanceOf(VeryComplexNameTestController::className(), $module->createControllerByID($route));
+        $this->assertNotInstanceOf(VeryComplexNameTestController::class, $module->createControllerByID($route));
     }
 }
 
diff --git a/tests/framework/db/ActiveQueryTest.php b/tests/framework/db/ActiveQueryTest.php
index 0177680..7723d78 100644
--- a/tests/framework/db/ActiveQueryTest.php
+++ b/tests/framework/db/ActiveQueryTest.php
@@ -256,7 +256,7 @@ abstract class ActiveQueryTest extends DatabaseTestCase
 
     public function testGetTableNames_wontFillFrom()
     {
-        $query = new ActiveQuery(Profile::className());
+        $query = new ActiveQuery(Profile::class);
         $this->assertEquals($query->from, null);
         $query->getTablesUsedInFrom();
         $this->assertEquals($query->from, null);
diff --git a/tests/framework/db/mysql/SchemaTest.php b/tests/framework/db/mysql/SchemaTest.php
index 8f85a5d..a3feecb 100644
--- a/tests/framework/db/mysql/SchemaTest.php
+++ b/tests/framework/db/mysql/SchemaTest.php
@@ -38,7 +38,7 @@ SQL;
 
         $dt = $schema->columns['dt'];
 
-        $this->assertInstanceOf(Expression::className(),$dt->defaultValue);
+        $this->assertInstanceOf(Expression::class, $dt->defaultValue);
     }
 
     public function testGetSchemaNames()
diff --git a/tests/framework/di/ContainerTest.php b/tests/framework/di/ContainerTest.php
index 0f7be22..5227f59 100644
--- a/tests/framework/di/ContainerTest.php
+++ b/tests/framework/di/ContainerTest.php
@@ -98,8 +98,8 @@ class ContainerTest extends TestCase
         $this->assertInstanceOf($Qux, $foo->bar->qux);
 
         // predefined property parameters
-        $fooSetter = FooProperty::className();
-        $barSetter = BarSetter::className();
+        $fooSetter = FooProperty::class;
+        $barSetter = BarSetter::class;
 
         $container = new Container();
         $container->set('foo', ['class' => $fooSetter, 'bar' => Instance::of('bar')]);
diff --git a/tests/framework/filters/auth/AuthTest.php b/tests/framework/filters/auth/AuthTest.php
index 2133e52..1974458 100644
--- a/tests/framework/filters/auth/AuthTest.php
+++ b/tests/framework/filters/auth/AuthTest.php
@@ -152,7 +152,7 @@ class AuthTest extends \yiiunit\TestCase
     public function testHttpHeaderAuth($token, $login)
     {
         Yii::$app->request->headers->set('X-Api-Key', $token);
-        $filter = ['class' => HttpHeaderAuth::className()];
+        $filter = ['class' => HttpHeaderAuth::class];
         $this->ensureFilterApplies($token, $login, $filter);
     }
 
diff --git a/tests/framework/web/UserTest.php b/tests/framework/web/UserTest.php
index 2001ea1..85cd643 100644
--- a/tests/framework/web/UserTest.php
+++ b/tests/framework/web/UserTest.php
@@ -355,14 +355,14 @@ class UserTest extends TestCase
         $appConfig = [
             'components' => [
                 'user' => [
-                    'identityClass' => UserIdentity::className(),
-                    'accessChecker' => AccessChecker::className()
+                    'identityClass' => UserIdentity::class,
+                    'accessChecker' => AccessChecker::class
                 ]
             ],
         ];
 
         $this->mockWebApplication($appConfig);
-        $this->assertInstanceOf(AccessChecker::className(), Yii::$app->user->accessChecker);
+        $this->assertInstanceOf(AccessChecker::class, Yii::$app->user->accessChecker);
     }
 
 }