php imagejpeg MIME类型

Question

I am using php's imagejpeg to save a GD image resource to a file, doing this:

imagejpeg($im, '../images/' . $image_id . '.jpg');

It works fine, but according to my browser, it tries to read the file as text/plain:

Resource interpreted as image but transferred with MIME type text/plain.

Is there a step before saving the file that I am supposed to do to make sure it's using the right mine-type?

I am using windows (XAMPP), could it be a Windows issue? EDIT: nope. I just tested in a linux server.

As far as the actual displaying, it's just plain html . My upload code is supposed to saves= the file as a plain jpeg in the server. It's just not saving it with the right mime type.

Thanks

Answer 1

AFAIK, the Apache server - in standard out of the box configuration - should sent content-type headers purely based upon file extension. Apache shouldn't even even be looking at the contents or how it was originally generated/stored.

On my out-of-the-box Apache2, the file conf/mime.types contains the line:

image/jpeg jpeg jpg jpe

which ought to do it, right?

Can you post a test-case, say, a simple html page with two img tags: one for your generated image, and one for a standard image that seems to work fine?

One last thought: Does it occur in all browsers? Maybe it's a browser issue, not a server one?

Answer 2

It sounds like you're dumping the contents of the file to the browser and not actually telling the browser what type of file it is. Try adding a Content-type header before you output your image to the browser:

header('Content-type: image/jpeg');

Answer 3

Are you sure you aren't using the wrong file-extension name? Otherwise, just put an normal image in the server and make sure the mime-types are properly configured. It could also be that your image data from the manipulation is corrupted.