1、單個文件上傳
首先建立一個模型models/UploadForm.php,內容如下
namespace app\models;
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;
/**
* @return array the validation rules.
*/
public function rules()
{
return [
[['file'], 'file'],
];
}
}
再建立一個視圖文件，內容如下
<?php use yii\widgets\ActiveForm; ?> <?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?> <?= $form->field($model, 'file')->fileInput() ?> <button>Submit</button> <?php ActiveForm::end() ?>
最后建立控制器文件，內容如下
namespace app\controllers;
use Yii;
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' => $model]);
}
}
注意這里我們沒有用model->load(...)，而是用了UploadedFile::getInstance(...)。區(qū)別是后者不會執(zhí)行$model->validate()，所以需要手動的去執(zhí)行$model->validate()來檢驗數據的合法性。如果檢驗通過了，上傳的文件保存在uploads文件夾下，即web目錄下的uploads里。
一些可選的配置選項
上傳文件不能為空
public function rules()
{
return [
[['file'], 'file', 'skipOnEmpty' => false],
];
}
上傳類型，不僅可以根據擴展名檢驗，還可以根據文件的內容進行檢驗
public function rules()
{
return [
[['file'], 'file', 'extensions' => 'jpg, png', 'mimeTypes' => 'image/jpeg, image/png',],
];
}
2、多文件上傳
如果你想一次上傳多個文件，只需調節(jié)幾個參數就可以達到目的
Model：
class UploadForm extends Model
{
/**
* @var UploadedFile|Null file attribute
*/
public $file;
/**
* @return array the validation rules.
*/
public function rules()
{
return [
[['file'], 'file', 'maxFiles' => 10], // <--- here!
];
}
}
View：
<?php use yii\widgets\ActiveForm; $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?> <?= $form->field($model, 'file[]')->fileInput(['multiple' => true]) ?> <button>Submit</button> <?php ActiveForm::end(); ?>
與單文件上傳不同的是下面這句
$form->field($model, 'file[]')->fileInput(['multiple' => true])
Controller:
namespace app\controllers;
use Yii;
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]);
}
}
這樣就可以實現多文件上傳了。
參考https://github.com/yiisoft/yii2/blob/master/docs/guide/input-file-upload.md
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
