致命错误:找不到“CI_Upload”类

时间:2014-09-02 06:36:23

标签: codeigniter upload

$config['upload_path'] = './content/';
        $config['allowed_types'] = 'gif|jpg|png|jpeg';
        $this->load->library('MY_Upload');
         $this->upload->initialize($config);
        $this->upload->initialize(array(
        "file_name"     => array("file_1.jpg", "file_2.jpg", "file_3.jpg"),
        "upload_path"   => "./content/"
    ));

        if($this->upload->do_multi_upload("userfile")){
           print_r($this->upload->get_multi_upload_data());
        }

我已将此代码用于多次上传,但无效,致命错误:Class' CI_Upload'没找到,错误属于这种类型。

1 个答案:

答案 0 :(得分:1)

扩展本地库

如果您只需要为现有库添加一些功能 - 可能添加一两个功能 - 那么用您的版本替换整个库就太过分了。在这种情况下,最好只是扩展类。扩展一个类几乎与用一些例外替换类相同:

The class declaration must extend the parent class.
Your new class name and filename must be prefixed with MY_ (this item is configurable. See below.).

例如,要扩展本机Email类,您将创建一个名为application / libraries / MY_Email.php的文件,并使用以下命令声明您的类:

class MY_Upload extends CI_Upload {

    }

注意:如果需要在类中使用构造函数,请确保扩展父构造函数:

    class MY_Upload extends CI_Upload {

            public function __construct()
            {
                parent::__construct();
            }
public function some_function()
{

}
        }

加载您的子类

要加载子类,您将使用通常使用的标准语法。不要包含你的前缀。例如,要加载上面扩展Email类的示例,您将使用:

$this->load->library('upload');

加载后,您将像通常对要扩展的类一样使用类变量。对于电子邮件类,所有呼叫都将使用:

$this->upload->some_function();

我认为您正在理解扩展本地库

您可以像这样更改代码

$config['upload_path'] = './content/';
        $config['allowed_types'] = 'gif|jpg|png|jpeg';
/************* i am changing only loading class only *********************/
        $this->load->library('upload');

         $this->upload->initialize($config);
        $this->upload->initialize(array(
        "file_name"     => array("file_1.jpg", "file_2.jpg", "file_3.jpg"),
        "upload_path"   => "./content/"
    ));

        if($this->upload->do_multi_upload("userfile")){
           print_r($this->upload->get_multi_upload_data());
        }
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