Yes, it will only show the image URL, and yes, by using the image array method, you will get other data too. That’s why I told you to use the original field instead of creating a new one.
What you are trying to do is uploading the resized image programmatically. This needs advanced PHP code and advanced knowledge on how WordPress uploads the files. I believe you can do it, but it is so much easier to save the resized file to your computer and upload it manually than creating the code you need, especially if you are not familiar with WordPress and PHP.
To do that you need to upload the file again somehow using WordPress core functions and then get the attachment ID. After that, you can update the new field with the new attachment by using the
If you don’t know how to do it and have no time to learn about it, I suggest you hire a developer to help you out with it, and I’d recommend looking for one on https://studio.envato.com/, https://www.upwork.com/, or https://codeable.io/.
I hope this makes sense 🙂
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