CodeIgniter上传图片，然后重新调整大小 [英] CodeIgniter Upload image and then resize it

问题描述

我想上传图片并调整其大小，到目前为止，上传的工作，以及缩略图的创建。但我不能得到原始的图像调整大小。所有这一切发生的是文件是直接上传到文件夹的原始大小。

这是我的代码我缺少什么：

  //初始化上传文件类
 $ config ['upload_path'] ='./image_uploads/'; 
 $ config ['allowed_types'] ='jpg | jpeg | gif | png'; 
 $ config ['max_size'] ='6048'; 
 $ this-> load-> library（'upload'，$ config）; 
 
 $ userfile =_upload_image; 
 //检查文件是否正在上传
 if（strlen（$ _ FILES [_ upload_image] [name]）> 0）{
 
 if $ this-> upload-> do_upload（$ userfile））//检查上传是否失败
 {
 $ 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（''，''））; 
} 
} 
} 
  

解决方案>

您尝试添加到配置选项

  $ config ['overwrite'] = TRUE; 
  

这应该可以做。

根据文档

如果设置为true，如果存在与您正在上传的文件同名的文件，则该文件将被覆盖。如果设置为false，则会有一个数字附加到文件名，如果另一个具有相同的名称。

I am trying to upload images and resize them, so far the upload is working and also the creation of thumb nail images. But I cant get the original image to be resized. All that is happening is the file is directly uploaded to the folder in its original size. I guess I am trying to take this image resize it then overwrite the originally uploaded file.

Here is my code what am I missing:

//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('', ''));   
              }
               }      
           }  

解决方案

Did you tried to add this to the config options

$config['overwrite'] = TRUE;

This should do the trick.

According to the documentation

If set to true, if a file with the same name as the one you are uploading exists, it will be overwritten. If set to false, a number will be appended to the filename if another with the>same name exists.

这篇关于CodeIgniter上传图片，然后重新调整大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！