php - CodeIgniter 中的图像处理

Question

我在使用 CodeIgniter 1.7 处理图像时遇到了一些问题。使用以下代码，图像已正确上传。唉，而不是制作一个新的图像，然后修改；现有图像被修改。有什么帮助吗？

//Upload image first
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png|bmp';

$this->load->library('upload', $config);        
$this->upload->do_upload();

//Now fix the image
$picloc = $this->upload->data();
$picloc = $picloc['file_name'];

$thumbnail = "thumb_".$picloc;

$imagemanip['image_library'] = 'gd2';
$imagemanip['source_image'] = './uploads/'.$picloc;
$imagemanip['new_img'] = './uploads/'.$thumbnail;
$imagemanip['maintain_ratio'] = TRUE;
$imagemanip['width'] = 250;
$imagemanip['height'] = 250;

$this->load->library('image_lib', $imagemanip);

$this->image_lib->resize();

Answer 1

问题很简单，你有一个错字：

$imagemanip['new_img'] = './uploads/'.$thumbnail;

索引应该是“new_image”，而不是“new_img”，所以该行变为..

$imagemanip['new_image'] = './uploads/'.$thumbnail;

Answer 2

//Upload image first
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png|bmp';

$this->load->library('upload', $config);        
$this->upload->do_upload();

//Now fix the image
$picloc = $this->upload->data();
$picloc = $picloc['file_name'];

$thumbnail = "thumb_".$picloc;

$imagemanip['image_library'] = 'gd2';
$imagemanip['source_image'] = './uploads/'.$picloc;
$imagemanip['new_image'] = './uploads/'.$thumbnail;// this will get change in new code.
$imagemanip['maintain_ratio'] = TRUE;
$imagemanip['width'] = 250;
$imagemanip['height'] = 250;

$this->load->library('image_lib', $imagemanip);

$this->image_lib->resize();

现在这将完成你的工作