Making images in posts link to the image file rather than the attachment page

Question

So I've got a bunch of content with images inserted into them. The users inserting content have done the default option of linking to the attachment page which isn't great. I've altered the

image_default_link_type

setting to make this link to the file by default now.

But I'd like to use a light box or something to display images on the site, which requires the to go to the image file, not the attachment page. Whilst I can make this work for images added since the default was changed, I was wondering if there was any solution that could make this change for me that was not going through and altering the content of each post?

TIA, Dan.

Answer 1

If you are never going to use the attachment page, then you can simply change the HTTP header ( a php function ) of attachment page to the image file.

Example -

header('Location: ' . wp_get_attachment_url() );

Note - Call it inside WordPress loop.