Codeigniter - 致命错误

Question

我有这个错误，致命错误：在第 219 行调用 D:\xampp\htdocs\application\controllers\page.php 中的未定义方法 CI_Input::file() 并使用 使用 JQuery 和 Code Igniter 进行多次上传 和文件扩展输入

这是我的代码：

if($this->input->file('userfile')){ //This is line 219
    $config['upload_path'] = './uploads/'; 
    $config['allowed_types'] = 'gif|jpg|png'; 
    $config['max_size']    = '1000'; 
    $config['max_width']  = '1024';
    $config['max_height']  = '768';

    $this->upload->initialize($config);
    $this->load->library('Multi_upload');

    $files = $this->multi_upload->go_upload();
    //var_dump($files);
    if ( ! $files )
    {
        $error = $this->upload->display_errors();                           
        echo $error;
        return false;
    }
    else
    {
        $data3 = array();
        foreach ($files as $idx => $name) {
            //var_dump($name['name']);
            $data3[] = array(
                'relation' => $id_residence,
                'images' => $name['name'],
            );
        };
        $data333 = $this->db->insert_batch('hotel_image', $data3);
    }
}

Answer 1

而不是 isset()

尝试：

$myInput = $this->input->file('userfile');
if(!empty($myInput)){
    ...
    ...
}