diff --git a/backend/config/main.php b/backend/config/main.php
index 16ddc61df8..38d02b0a33 100644
--- a/backend/config/main.php
+++ b/backend/config/main.php
@@ -1,4 +1,5 @@
 <?php
+
 $params = array_merge(
     require __DIR__ . '/../../common/config/params.php',
     require __DIR__ . '/../../common/config/params-local.php',
diff --git a/backend/config/params.php b/backend/config/params.php
index 7f754b91fe..6ebf2792b8 100644
--- a/backend/config/params.php
+++ b/backend/config/params.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     'adminEmail' => 'admin@example.com',
 ];
diff --git a/backend/config/test.php b/backend/config/test.php
index 411b05f49c..8016d71775 100644
--- a/backend/config/test.php
+++ b/backend/config/test.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     'id' => 'app-backend-tests',
     'components' => [
diff --git a/backend/tests/_data/login_data.php b/backend/tests/_data/login_data.php
index 32aef6ea36..841e279485 100644
--- a/backend/tests/_data/login_data.php
+++ b/backend/tests/_data/login_data.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     [
         'username' => 'erau',
diff --git a/backend/tests/_support/FunctionalTester.php b/backend/tests/_support/FunctionalTester.php
index a2bb8cb56a..b354ce6c43 100644
--- a/backend/tests/_support/FunctionalTester.php
+++ b/backend/tests/_support/FunctionalTester.php
@@ -20,7 +20,7 @@
 class FunctionalTester extends \Codeception\Actor
 {
     use _generated\FunctionalTesterActions;
-   /**
-    * Define custom actions here
-    */
+    /**
+     * Define custom actions here
+     */
 }
diff --git a/backend/tests/_support/UnitTester.php b/backend/tests/_support/UnitTester.php
index 7cc4976edf..f5e730423c 100644
--- a/backend/tests/_support/UnitTester.php
+++ b/backend/tests/_support/UnitTester.php
@@ -20,7 +20,7 @@
 class UnitTester extends \Codeception\Actor
 {
     use _generated\UnitTesterActions;
-   /**
-    * Define custom actions here
-    */
+    /**
+     * Define custom actions here
+     */
 }
diff --git a/backend/tests/functional/LoginCest.php b/backend/tests/functional/LoginCest.php
index 0716289a7f..d5eea5cbcd 100644
--- a/backend/tests/functional/LoginCest.php
+++ b/backend/tests/functional/LoginCest.php
@@ -26,7 +26,7 @@ public function _fixtures()
             ]
         ];
     }
-    
+
     /**
      * @param FunctionalTester $I
      */
diff --git a/backend/tests/functional/_bootstrap.php b/backend/tests/functional/_bootstrap.php
index 30ed54b830..933ad4f3b2 100644
--- a/backend/tests/functional/_bootstrap.php
+++ b/backend/tests/functional/_bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Here you can initialize variables via \Codeception\Util\Fixtures class
  * to store data in global array and use it in Cests.
@@ -13,4 +14,4 @@
  * ```php
  * \Codeception\Util\Fixtures::get('user1');
  * ```
- */
\ No newline at end of file
+ */
diff --git a/backend/tests/unit/_bootstrap.php b/backend/tests/unit/_bootstrap.php
index e432ce5314..0c04539bad 100644
--- a/backend/tests/unit/_bootstrap.php
+++ b/backend/tests/unit/_bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Here you can initialize variables via \Codeception\Util\Fixtures class
  * to store data in global array and use it in Tests.
diff --git a/common/config/__autocomplete.php b/common/config/__autocomplete.php
index d99dea50e6..e5e1c00d7c 100644
--- a/common/config/__autocomplete.php
+++ b/common/config/__autocomplete.php
@@ -11,7 +11,8 @@
  * }
  * ```
  */
-class Yii {
+class Yii
+{
     /**
      * @var \yii\web\Application|\yii\console\Application|__Application
      */
@@ -19,15 +20,16 @@ class Yii {
 }
 
 /**
- * @property yii\rbac\DbManager $authManager 
+ * @property yii\rbac\DbManager $authManager
  * @property \yii\web\User|__WebUser $user
- * 
  */
-class __Application {
+class __Application
+{
 }
 
 /**
  * @property app\models\User $identity
  */
-class __WebUser {
+class __WebUser
+{
 }
diff --git a/common/config/bootstrap.php b/common/config/bootstrap.php
index 93d01859b6..2cc8a0f24c 100644
--- a/common/config/bootstrap.php
+++ b/common/config/bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+
 Yii::setAlias('@common', dirname(__DIR__));
 Yii::setAlias('@frontend', dirname(dirname(__DIR__)) . '/frontend');
 Yii::setAlias('@backend', dirname(dirname(__DIR__)) . '/backend');
diff --git a/common/config/main.php b/common/config/main.php
index 980ff98e0b..40449a3e61 100644
--- a/common/config/main.php
+++ b/common/config/main.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     'aliases' => [
         '@bower' => '@vendor/bower-asset',
diff --git a/common/config/params.php b/common/config/params.php
index 9361512cfa..17be120570 100644
--- a/common/config/params.php
+++ b/common/config/params.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     'adminEmail' => 'admin@example.com',
     'supportEmail' => 'support@example.com',
diff --git a/common/config/test.php b/common/config/test.php
index c50955f732..f5b6c58991 100644
--- a/common/config/test.php
+++ b/common/config/test.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     'id' => 'app-common-tests',
     'basePath' => dirname(__DIR__),
diff --git a/common/models/LoginForm.php b/common/models/LoginForm.php
index 1f937a8c5c..1f1cb6f717 100644
--- a/common/models/LoginForm.php
+++ b/common/models/LoginForm.php
@@ -59,7 +59,7 @@ public function login()
         if ($this->validate()) {
             return Yii::$app->user->login($this->getUser(), $this->rememberMe ? 3600 * 24 * 30 : 0);
         }
-        
+
         return false;
     }
 
diff --git a/common/models/User.php b/common/models/User.php
index 53b6e1a34a..b096b61188 100644
--- a/common/models/User.php
+++ b/common/models/User.php
@@ -11,23 +11,23 @@
 /**
  * User model
  *
- * @property integer $id
+ * @property int $id
  * @property string $username
  * @property string $password_hash
  * @property string $password_reset_token
  * @property string $verification_token
  * @property string $email
  * @property string $auth_key
- * @property integer $status
- * @property integer $created_at
- * @property integer $updated_at
+ * @property int $status
+ * @property int $created_at
+ * @property int $updated_at
  * @property string $password write-only password
  */
 class User extends ActiveRecord implements IdentityInterface
 {
-    const STATUS_DELETED = 0;
-    const STATUS_INACTIVE = 9;
-    const STATUS_ACTIVE = 10;
+    public const STATUS_DELETED = 0;
+    public const STATUS_INACTIVE = 9;
+    public const STATUS_ACTIVE = 10;
 
 
     /**
@@ -110,7 +110,8 @@ public static function findByPasswordResetToken($token)
      * @param string $token verify email token
      * @return static|null
      */
-    public static function findByVerificationToken($token) {
+    public static function findByVerificationToken($token)
+    {
         return static::findOne([
             'verification_token' => $token,
             'status' => self::STATUS_INACTIVE
diff --git a/common/tests/_support/UnitTester.php b/common/tests/_support/UnitTester.php
index a0cc7a7bba..650790a9ae 100644
--- a/common/tests/_support/UnitTester.php
+++ b/common/tests/_support/UnitTester.php
@@ -20,7 +20,7 @@
 class UnitTester extends \Codeception\Actor
 {
     use _generated\UnitTesterActions;
-   /**
-    * Define custom actions here
-    */
+    /**
+     * Define custom actions here
+     */
 }
diff --git a/common/tests/unit/models/LoginFormTest.php b/common/tests/unit/models/LoginFormTest.php
index 4cf136661b..1feaf6a285 100644
--- a/common/tests/unit/models/LoginFormTest.php
+++ b/common/tests/unit/models/LoginFormTest.php
@@ -49,7 +49,7 @@ public function testLoginWrongPassword()
         ]);
 
         verify($model->login())->false();
-        verify( $model->errors)->arrayHasKey('password');
+        verify($model->errors)->arrayHasKey('password');
         verify(Yii::$app->user->isGuest)->true();
     }
 
diff --git a/console/migrations/m190124_110200_add_verification_token_column_to_user_table.php b/console/migrations/m190124_110200_add_verification_token_column_to_user_table.php
index 4a20dc719f..08e831aa11 100644
--- a/console/migrations/m190124_110200_add_verification_token_column_to_user_table.php
+++ b/console/migrations/m190124_110200_add_verification_token_column_to_user_table.php
@@ -1,6 +1,6 @@
 <?php
 
-use \yii\db\Migration;
+use yii\db\Migration;
 
 class m190124_110200_add_verification_token_column_to_user_table extends Migration
 {
diff --git a/environments/index.php b/environments/index.php
index 1083c32bb8..34d79bb2b8 100644
--- a/environments/index.php
+++ b/environments/index.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * The manifest of files that are local to specific environment.
  * This file returns a list of environments that the application
diff --git a/frontend/config/main.php b/frontend/config/main.php
index bbecaa47dc..418faa88f3 100644
--- a/frontend/config/main.php
+++ b/frontend/config/main.php
@@ -1,4 +1,5 @@
 <?php
+
 $params = array_merge(
     require __DIR__ . '/../../common/config/params.php',
     require __DIR__ . '/../../common/config/params-local.php',
diff --git a/frontend/config/params.php b/frontend/config/params.php
index 7f754b91fe..6ebf2792b8 100644
--- a/frontend/config/params.php
+++ b/frontend/config/params.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     'adminEmail' => 'admin@example.com',
 ];
diff --git a/frontend/config/test.php b/frontend/config/test.php
index 55d820c350..c0da46d09b 100644
--- a/frontend/config/test.php
+++ b/frontend/config/test.php
@@ -1,4 +1,5 @@
 <?php
+
 return [
     'id' => 'app-frontend-tests',
     'components' => [
diff --git a/frontend/models/PasswordResetRequestForm.php b/frontend/models/PasswordResetRequestForm.php
index db963e3567..4cdc0e1306 100644
--- a/frontend/models/PasswordResetRequestForm.php
+++ b/frontend/models/PasswordResetRequestForm.php
@@ -47,7 +47,7 @@ public function sendEmail()
         if (!$user) {
             return false;
         }
-        
+
         if (!User::isPasswordResetTokenValid($user->password_reset_token)) {
             $user->generatePasswordResetToken();
             if (!$user->save()) {
diff --git a/frontend/models/SignupForm.php b/frontend/models/SignupForm.php
index e42a8cab15..561a2e75db 100644
--- a/frontend/models/SignupForm.php
+++ b/frontend/models/SignupForm.php
@@ -48,7 +48,7 @@ public function signup()
         if (!$this->validate()) {
             return null;
         }
-        
+
         $user = new User();
         $user->username = $this->username;
         $user->email = $this->email;
diff --git a/frontend/tests/_support/UnitTester.php b/frontend/tests/_support/UnitTester.php
index 91557de371..42fd2505e8 100644
--- a/frontend/tests/_support/UnitTester.php
+++ b/frontend/tests/_support/UnitTester.php
@@ -20,7 +20,7 @@
 class UnitTester extends \Codeception\Actor
 {
     use _generated\UnitTesterActions;
-   /**
-    * Define custom actions here
-    */
+    /**
+     * Define custom actions here
+     */
 }
diff --git a/frontend/tests/acceptance/_bootstrap.php b/frontend/tests/acceptance/_bootstrap.php
index 47716f00f1..19b97ec0a7 100644
--- a/frontend/tests/acceptance/_bootstrap.php
+++ b/frontend/tests/acceptance/_bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Here you can initialize variables via \Codeception\Util\Fixtures class
  * to store data in global array and use it in Cepts.
@@ -13,4 +14,4 @@
  * ```php
  * \Codeception\Util\Fixtures::get('user1');
  * ```
- */
\ No newline at end of file
+ */
diff --git a/frontend/tests/functional/HomeCest.php b/frontend/tests/functional/HomeCest.php
index 99048af8f0..fd6e8e9f3c 100644
--- a/frontend/tests/functional/HomeCest.php
+++ b/frontend/tests/functional/HomeCest.php
@@ -14,4 +14,4 @@ public function checkOpen(FunctionalTester $I)
         $I->click('About');
         $I->see('This is the About page.');
     }
-}
\ No newline at end of file
+}
diff --git a/frontend/tests/functional/SignupCest.php b/frontend/tests/functional/SignupCest.php
index b83b795e2c..10cd523cc0 100644
--- a/frontend/tests/functional/SignupCest.php
+++ b/frontend/tests/functional/SignupCest.php
@@ -22,17 +22,17 @@ public function signupWithEmptyFields(FunctionalTester $I)
         $I->seeValidationError('Username cannot be blank.');
         $I->seeValidationError('Email cannot be blank.');
         $I->seeValidationError('Password cannot be blank.');
-
     }
 
     public function signupWithWrongEmail(FunctionalTester $I)
     {
         $I->submitForm(
-            $this->formId, [
-            'SignupForm[username]'  => 'tester',
-            'SignupForm[email]'     => 'ttttt',
-            'SignupForm[password]'  => 'tester_password',
-        ]
+            $this->formId,
+            [
+                'SignupForm[username]'  => 'tester',
+                'SignupForm[email]'     => 'ttttt',
+                'SignupForm[password]'  => 'tester_password',
+            ]
         );
         $I->dontSee('Username cannot be blank.', '.invalid-feedback');
         $I->dontSee('Password cannot be blank.', '.invalid-feedback');
diff --git a/frontend/tests/functional/_bootstrap.php b/frontend/tests/functional/_bootstrap.php
index 30ed54b830..933ad4f3b2 100644
--- a/frontend/tests/functional/_bootstrap.php
+++ b/frontend/tests/functional/_bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Here you can initialize variables via \Codeception\Util\Fixtures class
  * to store data in global array and use it in Cests.
@@ -13,4 +14,4 @@
  * ```php
  * \Codeception\Util\Fixtures::get('user1');
  * ```
- */
\ No newline at end of file
+ */
diff --git a/frontend/tests/unit/_bootstrap.php b/frontend/tests/unit/_bootstrap.php
index e432ce5314..0c04539bad 100644
--- a/frontend/tests/unit/_bootstrap.php
+++ b/frontend/tests/unit/_bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Here you can initialize variables via \Codeception\Util\Fixtures class
  * to store data in global array and use it in Tests.
diff --git a/frontend/tests/unit/models/PasswordResetRequestFormTest.php b/frontend/tests/unit/models/PasswordResetRequestFormTest.php
index 8492fba980..25730d69b8 100644
--- a/frontend/tests/unit/models/PasswordResetRequestFormTest.php
+++ b/frontend/tests/unit/models/PasswordResetRequestFormTest.php
@@ -43,7 +43,7 @@ public function testNotSendEmailsToInactiveUser()
     public function testSendEmailSuccessfully()
     {
         $userFixture = $this->tester->grabFixture('user', 0);
-        
+
         $model = new PasswordResetRequestForm();
         $model->email = $userFixture['email'];
         $user = User::findOne(['password_reset_token' => $userFixture['password_reset_token']]);
diff --git a/frontend/tests/unit/models/ResendVerificationEmailFormTest.php b/frontend/tests/unit/models/ResendVerificationEmailFormTest.php
index af3548a003..654ba417d4 100644
--- a/frontend/tests/unit/models/ResendVerificationEmailFormTest.php
+++ b/frontend/tests/unit/models/ResendVerificationEmailFormTest.php
@@ -2,7 +2,6 @@
 
 namespace frontend\tests\unit\models;
 
-
 use Codeception\Test\Unit;
 use common\fixtures\UserFixture;
 use frontend\models\ResendVerificationEmailForm;
diff --git a/frontend/tests/unit/models/ResetPasswordFormTest.php b/frontend/tests/unit/models/ResetPasswordFormTest.php
index 8d969a6f16..756c13a9eb 100644
--- a/frontend/tests/unit/models/ResetPasswordFormTest.php
+++ b/frontend/tests/unit/models/ResetPasswordFormTest.php
@@ -25,11 +25,11 @@ public function _before()
 
     public function testResetWrongToken()
     {
-        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function() {
+        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function () {
             new ResetPasswordForm('');
         });
 
-        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function() {
+        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function () {
             new ResetPasswordForm('notexistingtoken_1391882543');
         });
     }
@@ -40,5 +40,4 @@ public function testResetCorrectToken()
         $form = new ResetPasswordForm($user['password_reset_token']);
         verify($form->resetPassword())->notEmpty();
     }
-
 }
diff --git a/frontend/tests/unit/models/VerifyEmailFormTest.php b/frontend/tests/unit/models/VerifyEmailFormTest.php
index e0fe2e490b..472cc805a3 100644
--- a/frontend/tests/unit/models/VerifyEmailFormTest.php
+++ b/frontend/tests/unit/models/VerifyEmailFormTest.php
@@ -25,18 +25,18 @@ public function _before()
 
     public function testVerifyWrongToken()
     {
-        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function() {
+        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function () {
             new VerifyEmailForm('');
         });
 
-        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function() {
+        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function () {
             new VerifyEmailForm('notexistingtoken_1391882543');
         });
     }
 
     public function testAlreadyActivatedToken()
     {
-        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function() {
+        $this->tester->expectThrowable('\yii\base\InvalidArgumentException', function () {
             new VerifyEmailForm('already_used_token_1548675330');
         });
     }
diff --git a/requirements.php b/requirements.php
index 2859da7f91..919f9dcb96 100644
--- a/requirements.php
+++ b/requirements.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Application requirement checker script.
  *