yii2檔案上傳

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//模型
<?phpnamespace backend\models;use Yii;use yii\web\UploadedFile;class UploalModel extends \yii\db\ActiveRecord{    /**     * @var UploadedFile|Null file attribute     */    public $file;    /**     * @return array the validation rules.     */    public function rules()    {        return [            [["file"], "file",],        ];    }    /**公用上傳 上傳資訊(數組) 檔案名稱 大小 尾碼名限制 上傳後儲存的名字 update時為更新圖片 刪除原有圖片*/    public function upload($img,$name = ‘/vessel‘,$siez = ‘‘,$arr_type = ‘‘,$text_name = ‘‘,$act=‘update‘,$url=‘/vessel/20180831/153571385083726.jpg‘)    {        $path = ‘../..‘;        $dirname = $path.$name;        $fill=$this->file->extension;//圖片的名字只取尾碼名        if(empty($text_name)){            $ran=time().rand(10000,99999);//隨機名字        }else{$ran = $text_name;}        $arr = $arr_type;        if(!empty($arr)){            if(!in_array($fill,$arr)){ return json_encode(‘格式不正確‘);}        }        //定義上傳大小和類型        if(!empty($siez)){            if($img[‘size‘]>$siez) {return json_encode(‘檔案大小超過限制‘);}        }        //檔案上傳存放的目錄        $dir=$dirname.‘/‘.date("Ymd");        $dir_sev=$name.‘/‘.date("Ymd");/*資料庫儲存路徑*/        if(!file_exists($dir)) {            mkdir($dir,0777,true);        }        if ($this->validate()) {            //檔案名稱            $fileName = $ran .‘.‘.$fill;            $dir = $dir."/". $fileName;            if($act == ‘update‘){if($this->file->saveAs($dir)){@unlink($path.$url);}}/*刪除圖片*/            $uploadSuccessPath = $dir_sev."/". $fileName;/*最後路徑*/            return $uploadSuccessPath;        }    }}

//控制器
<?phpnamespace backend\controllers;use Yii;use backend\models\UploalModel;use yii\web\UploadedFile;class TestController extends \yii\web\Controller{    /**     *    檔案上傳     *  我們這裡上傳成功後把圖片的地址進行返回     */    public function actionIndex ()    {        $model = new UploalModel();        $uploadSuccessPath = "";        if (Yii::$app->request->isPost) {            $model->file = UploadedFile::getInstance($model, "file");            $file = $model->upload((array)$model->file);            return $file;        }        return $this->render("index", [            "model" => $model,            "uploadSuccessPath" => $uploadSuccessPath,        ]);    }}

//視圖
<?phpuse yii\widgets\ActiveForm;$form = ActiveForm::begin(["options" => ["enctype" => "multipart/form-data"]]);?>    <input type="hidden" name="UploalModel[file]" value="">    <input type="file" id="uploalmodel-file" name="UploalModel[file]">    <button>Submit</button><?php ActiveForm::end(); ?>

 

yii2檔案上傳