frontend\modules\user\controllers\SettingController::actionAvatar PHP Method

    public function actionAvatar()
    {
        /** @var AvatarForm $model */
        $model = Yii::createObject(AvatarForm::className());
        if ($model->load(Yii::$app->request->post())) {
            if ($model->user->avatar) {
                // 删除头像
                $model->deleteImage();
            }
            $image = $model->uploadImage();
            $hasError = true;
            if ($image !== false) {
                $path = $model->getNewUploadedImageFile();
                if ($image->saveAs($path)) {
                    $hasError = false;
                }
            }
            if ($hasError) {
                $model->useDefaultImage();
            }
            if ($model->save() === false) {
                $hasError = true;
            }
            if ($hasError) {
                Yii::$app->session->setFlash('error', '您的头像更新失败');
            } else {
                Yii::$app->session->setFlash('success', '您的用户信息修改成功');
            }
            return $this->refresh();
        }
        return $this->render('avatar', ['model' => $model]);
    }