'trim'], ['username', 'required'], [ 'username', 'unique', 'targetClass' => User::className(), 'message' => Yii::t('app', 'This username has already been taken') ], ['username', 'string', 'min' => 2, 'max' => 255], ['email', 'filter', 'filter' => 'trim'], ['email', 'required'], ['email', 'email'], ['email', 'string', 'max' => 255], [ 'email', 'unique', 'targetClass' => User::className(), 'message' => Yii::t('app', 'This email address has already been taken') ], ['password', 'required'], ['password', 'string', 'min' => 6], ]; } public function attributeLabels() { return [ 'username' => Yii::t('app', 'Username'), 'email' => Yii::t('app', 'Email'), 'password' => Yii::t('app', 'Password'), ]; } public function signup() { if (! $this->validate()) { return null; } $user = new User(); $user->username = $this->username; $user->email = $this->email; $user->setPassword($this->password); $user->generateAuthKey(); return $user->save() ? $user : null; } }