how to use custom field for post archive thumbnails
all my posts have a featured image that is also shown as the thumbnail in the posts’ archive page, but I want to replace it (just for the archive pages – category page showing blog posts, tag pages showing blog posts – all of them) with the value from a custom field, which has the image URL for each post
any idea on how to do this? I would need a function maybe (to add it on functions.php), something to force it, as editing the archive file is not really an option for me
I can’t seem to find anything like this on the internet or on this website
thanks a lot
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