Codeigniter多文件上传与缩略图实现代码

class Upload extends Controller {
  function go() {
    if(isset($_POST['go'])) {
      //初始化
      $config['upload_path'] = 'album/source';
      $config['allowed_types'] = 'gif|jpg|png|bmp|jpeg';
      $config['encrypt_name'] = TRUE;
      $config['remove_spaces'] = TRUE;
      $config['max_size']  = '0';
      $config['max_width']  = '0';
      $config['max_height']  = '0';
      $this->load->library('upload', $config);
      //170*170图片
      $configThumb = array();
      $configThumb['image_library'] = 'gd2';
      $configThumb['source_image'] = '';
      $configThumb['create_thumb'] = TRUE;
      $configThumb['maintain_ratio'] = TRUE; //保持图片比例
      $configThumb['new_image'] = 'album/thumb';
      $configThumb['width'] = 170;
      $configThumb['height'] = 170;
      //600*600图片
      $configLarge = array();
      $configLarge['image_library'] = 'gd2';
      $configLarge['source_image'] = '';
      $configLarge['create_thumb'] = TRUE;
      $configLarge['maintain_ratio'] = TRUE; //保持图片比例
      $configLarge['new_image'] = 'album/large';
      $configLarge['width'] = 600;
      $configLarge['height'] = 600;
      $this->load->library('image_lib');
      for($i = 1; $i         $upload = $this->upload->do_upload('image'.$i);
        if($upload === FALSE) continue;
        $data = $this->upload->data();//返回上传文件的所有相关信息的数组
        $uid = $this->session->userdata('uid');
        $uploadedFiles[$i] = $data;
        if($data['is_image'] == 1) {
          //初始化170*170
          $configThumb['source_image'] = $data['full_path']; //文件路径带文件名
          $this->image_lib->initialize($configThumb);
          $this->image_lib->resize();
          //初始化600*600
          $configLarge['source_image'] = $data['full_path']; //文件路径带文件名
          $this->image_lib->initialize($configLarge);
          $this->image_lib->resize();
        }
        //插入图片信息到album表,插入的文件名为source目录文件名
        $picture = array(
            'filename' => $data['file_name'],
            'albumID' => $this->uri->segment(4,0),
            'uid' => $this->session->userdata('uid'),
            'dateline' => time(),
            'describe' => '',
            'click' => 0
        );
        $this->load->model('album_model');
        $this->album_model->AddPic($picture);
        $picture = array();
      }
    }
    /* 转出 */
    $albumID = $this->uri->segment(4);
    $backurl = site_url() . 'photo/editpic/album/' .$albumID;
    $this->session->set_flashdata('msg','图片上传成功.');
    redirect($backurl,'refresh');
  }
}

2，views:new_pic.view文件：

type="submit" name="go" value="上传照片" class="button" />

注意事项： 1，要一次上传几个文件，修改表单和控制器中循环部分的参数就好。 2，album\\source 是上传后原图目录 large和thumb分别是两次执行$this->image_lib->resize();后存放缩略图的目录。 3，缩略图文件名，如需和album\\source目录一致，请添加参数 $config['thumb_marker'] = '';。 4，$picture 这部分数组是保存到数据库的东西，无需理会。