PHP教程
/**
* get ajax uploaded files.
*/
public function actionGetAjax(){
    $model=new Attachment();//加載附件模型
    $tmpFile  = CUploadedFile::getInstanceByName('image');//讀取圖像上傳域,并使用系統上傳組件上傳
    $Directroy = Yii::app()->params['uploadPath'];//讀取上傳配置文件,我的配置是/uploads
    //創建文件存放路徑
    $y     = date('Y');
    $m     = date('m');
    $d     = date('d');
    $Directroy = $Directroy."/";
    $pathd = $Directroy.$y."/".$m."/".$d."/";
    Tool::makedir(dirname(Yii::app()->BasePath).$pathd); //創建文件夾,此處一定要加上dirname(Yii::app()->BasePath)不然可能會出錯;
    if(is_object($tmpFile) && get_class($tmpFile)==='CUploadedFile'){
      $filename        = time().rand(0,9);
      $ext          = $tmpFile->extensionName;//上傳文件的擴展名
      if($ext=='jpg'||$ext=='gif'||$ext=='png'){
          $big          = $pathd . $filename . '_600.' . $ext; //310縮略圖
        $small         = $pathd . $filename . '_310.' . $ext; //310縮略圖
        $thumb         = $pathd . $filename . '_100.' . $ext; //100縮略圖
        $model->zat_thumb    = $thumb; //縮略圖
      }
      $uploadfile       = $pathd . $filename . '.' . $ext;   //保存的路徑
      $model->zat_url     = $pathd . $filename . '.' . $ext;   //重新賦值
      $model->zat_file_name  = $filename . '.' . $ext;        //文件名稱
      $model->zat_title    = $tmpFile->name;            //文件標題
      $model->zat_file_type  = $tmpFile->type;            //文件類型
      $model->zat_file_size  = $tmpFile->size;            //文件大小
      $model->zat_image    = 2;
      $model->zat_ip     = Yii::app()->request->userHostAddress; //上傳IP
      //print_r($uploadfile);
    }
    if($model->save()){
      $tmpFile->saveAs(dirname(Yii::app()->BasePath).$uploadfile);//保存到服務器
      if($ext=='jpg'||$ext=='gif'||$ext=='png'){
        $img = Yii::app()->image->load(dirname(Yii::app()->BasePath).$uploadfile); //使用image-Kohana圖像處理庫擴展
        $img->resize(600,600)->quality(85);
        $img->save(dirname(Yii::app()->BasePath).$big);//生成600縮略圖
        $img->resize(310,310)->quality(85);
        $img->save(dirname(Yii::app()->BasePath).$small);//生成310縮略圖
        $img->resize(100,100)->quality(85);
        $img->save(dirname(Yii::app()->BasePath).$thumb);//生成100縮略圖
      }
      if($ext=='jpg'||$ext=='gif'||$ext=='png'){
        $str = json_encode(
          array(
            'upfile'=>array(
              'zat_id' => Yii::app()->db->getLastInsertID(), //取插ID
              'file' => $uploadfile,//原圖
              'small' => $small,//310縮略圖
              'thumb' => $thumb,//100縮略圖
            )
          )
        );
      }else{
        $str = json_encode(
          array(
            'upfile'=>array(
              'zat_id' => Yii::app()->db->getLastInsertID(),
              'file' => $uploadfile,
            )
          )
        );
      }
      echo $str;
    }
}

PHP教程
<input id="fileupload" type="file" name="image" multiple>
<script src="<?php echo Yii::app()->baseUrl;?>/js/jquery.ui.widget.js"></script>
<script src="<?php echo Yii::app()->baseUrl;?>/js/jquery.iframe-transport.js"></script>
<script src="<?php echo Yii::app()->baseUrl;?>/js/jquery.fileupload.js"></script>
<script>
$(function () {
  $('#fileupload').fileupload({
    dataType: 'json',
    url: '/Attachment/GetAjax',
    success: function (json) {
        $('#MemType_zmt_pic').attr('value',json.upfile.file);
        $("#images").attr('src',json.upfile.file);
    }
  });
});
</script>