add_image_size function has nothing to do with the images that are located in theme root directory. When you add add_image_size function , we are saying that : Hey WordPress! Can you please also re-size my uploaded images via WordPress admin to this particular size also hard crop the image if image size is bigger ( … Read more
How to rename image at uploading on specific plugin or post-type in WordPress
We can’t do this. As simple as that
After a few days reading about srcset attribute (Thanks Benoti for point to this!), definitely, I can see that this is the right way. This solution is simple, enough to solve this question, although srcset attribute with <picture> tag is much more powerfull. My solution: Declare sizes in functions.php add_image_size( ‘c200x200’, 200, 200, true ); … Read more
WordPress will only create image size if the original size is greater than the registered sizes. That’s just a hint as you didn’t told us the image size and the register add_image_size() you add for your install.
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You can use the add_post_meta function: add_post_meta( get_the_ID(), ‘my_custom_image_url’, ‘http://domain.com/image.jpg’, true ); The code above assumes that a) you will have only one image per page; and b) you are in a loop so get_the_ID will return a valid ID of the page you want to attach the meta-data to. Documentation here.