Paypal SANDBOX SetExpressCheckout stopped working

Question

For some reason, when I try to connect to paypal sandbox API and do SetExpressCheckout using my XAMPP server it fails. I turned error reporting on and this is the message I get:

Warning: file_get_contents(https://api-3t.sandbox.paypal.com/nvp/): failed to open stream: HTTP request failed! HTTP/1.0 403 Forbidden

I've done some tests and it just does not make sense:

1. I can connect to the live API with correct credentials.
2. I can connect to the live API with incorrect credentials.
3. I cannot connect to the sandbox API with correct or incorrect credentials.
4. I can connect to live API and sandbox API using web browser using correct or incorrect credentials.
5. If I put in an invalid website name, it gives me a different warning (below).

Warning:

Warning: file_get_contents(): php_network_getaddresses: getaddrinfo failed: No such host is known.

So why is it that when I connect to https://api-3t.sandbox.paypal.com/nvp/ using my local server there is no response? I have not changed the code and it still works with Paypal live so what's going on here suddenly?

Answer 1

From March 25 PayPal doesn't support HTTP/1.0, see details here. You can find helpfull this post