Yii2使用自帶的UploadedFile實現(xiàn)的文件上傳

    我們先來看看在yii2中支持的圖片上傳怎么進行處理的。
    首先我們創(chuàng)建model\Upload.php文件
    <?php
    namespace backend\models;
    use Yii;
    use yii\web\UploadedFile;
    class Upload extends \yii\db\ActiveRecord
    {
    /**
    * @var UploadedFile|Null file attribute
    */
    public $file;
    /**
    * @return array the validation rules.
    */
    public function rules()
    {
    return [
    [["file"], "file",],
    ];
    }
    }
    下面我們看看view層是怎么渲染的
    <?php
    use yii\widgets\ActiveForm;
    $form = ActiveForm::begin(["options" => ["enctype" => "multipart/form-data"]]); ?>
    <?= $form->field($model, "file")->fileInput() ?>
    <button>Submit</button>
    <?php ActiveForm::end(); ?>
    最后實現(xiàn)controller層的實現(xiàn)
    namespace backend\controllers;
    use backend\models\Upload;
    use yii\web\UploadedFile;
    class ToolsController extends \yii\web\Controller
    {
    /**
    * 文件上傳
    * 我們這里上傳成功后把圖片的地址進行返回
    */
    public function actionUpload ()
    {
    $model = new Upload();
    $uploadSuccessPath = "";
    if (Yii::$app->request->isPost) {
    $model->file = UploadedFile::getInstance($model, "file");
    //文件上傳存放的目錄
    $dir = "../../publichttp://pic02.newdu.com/uploads/".date("Ymd");
    if (!is_dir($dir))
    mkdir($dir);
    if ($model->validate()) {
    //文件名
    $fileName = date("HiiHsHis").$model->file->baseName . "." . $model->file->extension;
    $dir = $dir."/". $fileName;
    $model->file->saveAs($dir);
    $uploadSuccessPath = "http://pic02.newdu.com/uploads/".date("Ymd")."/".$fileName;
    }
    }
    return $this->render("upload", [
    "model" => $model,
    "uploadSuccessPath" => $uploadSuccessPath,
    ]);
    }
    }
    以上所述是小編給大家介紹的Yii2使用自帶的UploadedFile實現(xiàn)的文件上傳的相關(guān)知識，希望對大家有所幫助