Enable the Hidden File Upload Path Setting in WordPress Media Settings

Sometimes we need to serve images from a separate CDN domain to speed up loading. Instead of using a plugin, we can configure WordPress's built-in URL settings directly in code;

if(get_option('upload_path')=='wp-content/uploads' || get_option('upload_path')==null) { update_option('upload_path',WP_CONTENT_DIR.'/uploads'); }

Just add this code to function.php.