Change ouput url of WordPress [Gallery] Shortcode

Question

I recently installed ta plugin that now uploads my images from the media library to s3.

I have also FTP's the entire uploads folder to s3 which encompasses about 4000 images.

I have used throughout my site the wordpress gallery shortcode however somewhere and somehow it outputs the siteurl.

How do I change this so that I can override the url to be the one from my S3 bucket?

I will admit I have no idea what I am doing here or where to start and I really will appreciate your help :)

Answer 1

You can filter images src attribute output and replace old url with new url as follow. copy below code to your theme functions.php and replace www.oldurl.com and www.newurl.com with your own urls.

add_filter('wp_get_attachment_image_src', function ($image) {
    if(is_array($image)){
        $image[0] = str_replace('www.oldurl.com', 'www.newurl.com', $image[0]);
    }

    return $image;
}, 999);