yii2.0上传图片

model：

use Yii;

/** * 获取头像url地址 * @return 头像的url地址 */public function getPortraitUrl(){    return self::getAvatarUrlById($this->id);}

/** * 获取头像存放路径 * @return 头像的存放路径 */public static function getAvatarPathById($companyId){    $string = str_pad($companyId, 6, ‘0‘, STR_PAD_LEFT);    $path = ‘company/‘ . substr($string, 0, -4) . ‘/‘ . substr($string, -4, 2) . ‘/‘ . substr($string, -2, 2) . image_type_to_extension(IMAGETYPE_JPEG);;    return $path;}

/** * 通过用户ID获取头像url地址 */public static function getAvatarUrlById($companyId){    $path = self::getAvatarPathById($companyId);    $file = Yii::getAlias(‘@uploadPath/‘ . $path);    if (file_exists($file)) {        $makeTime = filemtime($file);        return Yii::getAlias(‘@uploadUrl/‘ . $path) . ‘?‘ . $makeTime;    }    return Yii::getAlias(‘@resUrl/‘ . self::DEFAULT_AVATAR);}

控制器：

use Yii;use app\models\Company;use yii\helpers\FileHelper;use yii\web\Controller;use yii\web\UploadedFile;

public function actionProfile(){    $id = Yii::$app->session[‘companyId‘];//得到id    $model = Company::findOne($id);    $imageUpload = UploadedFile::getInstance($model, ‘imageUpload‘);//返回一个上传文件    if (Yii::$app->request->isPost && $model->load(Yii::$app->request->post())) {//判断是否post提交，加载数据        if ($imageUpload && $model->validate([‘imageUpload‘])) {//数据验证            $path =  Company::getAvatarPathById($id);//图片的路径别名            $avatarImage = Yii::getAlias(‘@uploadPath/‘ . $path);//将路径别名转化为实际的路径            FileHelper::createDirectory(dirname(Yii::getAlias($avatarImage)));//创建目录            $imageUpload->saveAs(Yii::getAlias($avatarImage));//保存图片        }        if($model->save()) {            Yii::$app->session[‘companyName‘] = $model->name;        }    }    return$this->render(‘profile‘, [‘model‘ => $model]);}

视图显示：

use app\models\Company;

<?= $form->field($model, ‘imageUpload‘)->fileInput([‘maxlength‘ => true])->hint(‘建议上传尺寸:100*100--300*300‘) ?>

<?= $form->field($model, ‘imageUpload‘, [‘inputTemplate‘=>‘<img src="‘.\app\models\Company::getAvatarUrlById($model->id).‘" width="100px" height="100px" />‘])->staticControl() ?>

结果显示：网页显示本地显示 （当前ID.jpeg）