Php CodeIgniter上载图像，然后调整其大小

我正在尝试上传图像并调整它们的大小，到目前为止，上传工作正常，并且正在创建拇指指甲图像。但是我无法调整原始图像的大小。所发生的一切就是文件以其原始大小直接上载到文件夹中。我想我是想把这张图片调整大小，然后覆盖原来上传的文件

这是我的代码，我遗漏了什么：

//Initialise the upload file class
    $config['upload_path'] = './image_uploads/';
    $config['allowed_types'] = 'jpg|jpeg|gif|png';
    $config['max_size'] = '6048';
    $this->load->library('upload', $config);

    $userfile = "_upload_image";
            //check if a file is being uploaded
            if(strlen($_FILES["_upload_image"]["name"])>0){

                if ( !$this->upload->do_upload($userfile))//Check if upload is unsuccessful
                {
                    $upload_errors = $this->upload->display_errors('', '');
                    $this->session->set_flashdata('errors', 'Error: '.$upload_errors);   
                    redirect('admin/view_food/'.$food->course_id);  
                }
                else
                {
                    //$image_data = $this->upload->data();

                     ////[ THUMB IMAGE ]
                    $config2['image_library'] = 'gd2';
                    $config2['source_image'] = $this->upload->upload_path.$this->upload->file_name;
                    $config2['new_image'] = './image_uploads/thumbs';
                    $config2['maintain_ratio'] = TRUE;
                    $config2['create_thumb'] = TRUE;
                    $config2['thumb_marker'] = '_thumb';
                    $config2['width'] = 75;
                    $config2['height'] = 50;
                    $this->load->library('image_lib',$config2); 

                    if ( !$this->image_lib->resize()){
                $this->session->set_flashdata('errors', $this->image_lib->display_errors('', ''));   
              }

                    //[ MAIN IMAGE ]
                    $config['image_library'] = 'gd2';
                    $config['source_image'] = $this->upload->upload_path.$this->upload->file_name;
                    //$config['new_image'] = './image_uploads/';
                    $config['maintain_ratio'] = TRUE;
                    $config['width'] = 250;
                    $config['height'] = 250;
                    $this->load->library('image_lib',$config); 

                    if ( !$this->image_lib->resize()){
                $this->session->set_flashdata('errors', $this->image_lib->display_errors('', ''));   
              }
               }      
           }  

---

您是否尝试将其添加到配置选项中

$config['overwrite'] = TRUE;

这应该能奏效

根据文件

如果设置为true，则如果存在与您正在上载的文件同名的文件，则该文件将被覆盖。如果设置为false，则如果存在另一个具有>相同名称的文件名，则会在文件名后追加一个数字

---

在过去的20个小时里，我一直在尝试创建缩略图，直到我意识到我在哪里弄乱了代码，我没有初始化我的配置数组，我才成功

只需在加载图像库后添加这行代码

$this->image_lib->initialize($config);

---

希望这对你有用…………竖起大拇指

如果您喜欢在CI中使用图像，我强烈推荐使用图像库