有没有办法让一个Codeigniter控制器返回一个图像？

问题描述

我想知道是否有一个控制器的方法，而不是返回一个字符串或视图，返回一个图像（是JPG，PNG等）。例如，我不想以$ this-> load-> view（'folder / special_view.php）结束，而是像$ this-> load-> image（'images / gorilla.png'） ，并有它，所以如果我的用户去的控制器，他们会看到一个图像，如果他们去一个正常的.png或jpeg。我可以设置标题，以便它期望一个不同的MIME？

I was wondering if there was a way for a controller to, instead of returning a string, or a view, return an image (be it JPG, PNG etc). For example, instead of ending with a $this->load->view('folder/special_view.php), I'd like to do something like $this->load->image('images/gorilla.png'), and have it so if my user were to go to that controller they would see an image as if they'd gone to a normal .png or jpeg. Can I set the headers so it expects a different MIME? Example code of this would be fantastic.

这将需要我永远解释为什么我需要这个，但它涉及到一个预制CMS到codeigniter，并有它需要证明事情是真实的。非常感谢！

It would take forever for me to explain why I need this, but it involves bringing a premade CMS into codeigniter, and having it need certian things to be true. Thank you so much!

推荐答案

确实可以，使用这个而不是 $ this-> load - > view（）

sure you can, use this instead of $this->load->view()

$filename="/path/to/file.jpg"; //<-- specify the image  file
if(file_exists($filename)){
  header('Content-Length: '.filesize($filename)); //<-- sends filesize header
  header('Content-Type: image/jpg'); //<-- send mime-type header
  header('Content-Disposition: inline; filename="'.$filename.'";'); //<-- sends filename header
  readfile($filename); //<--reads and outputs the file onto the output buffer
  die(); //<--cleanup
  exit; //and exit
}

当然，你需要交换mime类型case该文件是一个png或gif

of course, you need to swap the mime-type in case the file is a png or gif

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