How to modify images during upload

You need to use attachment_fields_to_save filter. There is nice example on codex. So instead of copying that here, I would rather like to point you towards the codex page. Please take a look here. I hope this helps.

How to use lossless compression with WP_Image_Editor

With @jgraup ‘s help in comments, I had a look at the responsive images plugin linked there. While that particular one has several other filters on things like post content which I would have preferred not to use, the RespImg class included is exactly what I was wanting. I was originally considering what would be … Read more

wordpress images not showing properly

I would check the upload_path upload_url_path under your admin options. I suspect they are still referencing the other website. Go to https://yourdomain.com/wp-admin/options.php and scroll down till you get to the the upload_path and upload_url_path.

Images Wont Display After Importing From Old WordPress

WordPress generate some smaller images (the thumbnails) so, the images are on your server, but thumbnails are not. If the issue is just a thumbnail rebuild, you can do rebuild them with this plugin: https://wordpress.org/plugins/ajax-thumbnail-rebuild/ With lucky you will not need to do anything else. But thumbnails sizes are defined per theme, plugin or even … Read more

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