Cant call wp-load.php in file on subdomain

As long as you know the exact location of wp-load.php you could just include it in your scripts.

However, you may want to take a look at this article by Otto:

https://ottopress.com/2010/dont-include-wp-load-please/

What do you mean by exact location? The absolute or relative path? Or can it even be on an external domain?

Never tried. It would most likely require a bit of hacking.

However you can put or rename wp-content to whatever you like by adding something like this to your wp-config.php file:

define ('WP_CONTENT_DIR','/full/path/to/your/content/dir');
define ('WP_CONTENT_URL','https://example.com/full/path/to/your/content/dirs/url');

Already defined it in wp-config but it still doesn’t work with wp-load.

Are you sure they are defined correctly? WP_CONTENT_DIR must be the full path and no trailing slash and WP_CONTENT_URL must be the full URL.

You shouldn’t need to worry about wp-load.php because it’s already being loaded if wp-config.php is firing off.

Check. Check.
Still doesn’t work. Everytime wp-load is called from a php file on the subdomain it just redirects me back to the main domain. It’s like everything above wp-content (root directory) is “non-existent”.

By the way: I also tried change the content directory and domain with a fresh install. Still doesn’t work. Could this be a hosting or PHP problem?