URL / Rewrite Filter

How to make Guttenberg block editor work, when WordPress Address & Site Address are different domains

Recently, I worked on a project where the WordPress site needed to have one domain for Site Address(SITE URL) and another one for WordPress Address(HOME URL). Everything was working fine. Except, whenever we tried to publish a post in Guttenberg editor, we were getting an error saying “Updating failed. “.

Soon, I realized that as we were accessing the site admin section from the Site Address, and when we were hitting the update or publish button on Guttenberg editor, it was sending a request to the REST API with WordPress Address(HOME URL) as it’s base URL. The REST API URL should be the same domain from which the request is being sent. So, we just have to make WordPress Guttenberg editor use the Site Address ( SITE URL) instead of WordPress Address(HOME URL) as a base for API.

Here is the snippet code is given below, which uses ‘rest_url‘ filter to replace the HOME URL in REST API URL to SITE URL.

// change WordPress API URL to HOME URL
add_filter('rest_url', 'wptips_home_url_as_api_url');
function wptips_home_url_as_api_url($url) {
    $url = str_replace(home_url(),site_url() , $url);
    return $url;

Please let me know if you ever had to work on a project where you had to assign different domains to Site Address and WordPress Address. I will soon write a detailed post on how we got the site to work this way 🙂

By Murali Kumar

I am a Full Stack Web Developer with over 12 years of experience. I love WordPress & WooCommerce.

If you need help of a WordPress developer for your website, Get in touch now!.

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