1、单个文件上传
首先建立一个模型models/UploadForm.PHP,内容如下
use yii\base\Model;
use yii\web\UploadedFile;
/**
- UploadForm is the model behind the upload form.
*/
class UploadForm extends Model
{
/**- @var UploadedFile file attribute
*/
public $file;
- @var UploadedFile file attribute
/**
- @return array the validation rules.
*/
public function rules()
{
return [
[['file'],'file'],];
}
}
<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?>
<?= $form->field($model,'file')->fileinput() ?>
<?php ActiveForm::end() ?>
use yii\web\Controller;
use app\models\UploadForm;
use yii\web\UploadedFile;
class SiteController extends Controller
{
public function actionUpload()
{
$model = new UploadForm();
if (Yii::$app->request->isPost) {
$model->file = UploadedFile::getInstance($model,'file');
if ($model->file && $model->validate()) {
$model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);
}
}
return $this->render('upload',['model' => $model]);
}
}
注意这里我们没有用model->load(...),而是用了UploadedFile::getInstance(...)。区别是后者不会执行$model->validate(),所以需要手动的去执行$model->validate()来检验数据的合法性。如果检验通过了,上传的文件保存在uploads文件夹下,即web目录下的uploads里。
一些可选的配置选项
上传类型,不仅可以根据扩展名检验,还可以根据文件的内容进行检验
2、多文件上传
Model:
- @return array the validation rules.
*/
public function rules()
{
return [
[['file'],'maxFiles' => 10],// <--- here!
];
}
}
View:
?>
<?= $form->field($model,'file[]')->fileInput(['multiple' => true]) ?>
<?php ActiveForm::end(); ?>
Controller:
use yii\web\Controller;
use app\models\UploadForm;
use yii\web\UploadedFile;
class SiteController extends Controller
{
public function actionUpload()
{
$model = new UploadForm();
if (Yii::$app->request->isPost) {
$model->file = UploadedFile::getInstances($model,'file');
if ($model->file && $model->validate()) {
foreach ($model->file as $file) {
$file->saveAs('uploads/' . $file->baseName . '.' . $file->extension);
}
}
}
return $this->render('upload',['model' => $model]);
}
}
参考https://github.com/yiisoft/yii2/blob/master/docs/guide/input-file-upload.md
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程之家。
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