Laravel includes a feature to sign URLs so that publicly accessible routes can be visited knowing the query string hasn’t been tampered with.
Laravel uses this for email verification links by default. I ran into a problem where signed URLs were always failing (throwing the 403 exception) in my production environment. The same code worked locally.
In turns out that this was a result of the way the package uses query string parameters to build the signature. My production nginx configuration was creating a different parameter signature to what Laravel was expecting. This was fine for unsigned URLs as the routing still worked, but it did mean that the ‘signed’ middleware would always fail.
The solution was just to alter my sites nginx config like this:
try_files $uri $uri/ /index.php?q=$uri&$args;
try_files $uri $uri/ /index.php?$query_string;
Now Laravel’s request object receives the same query parameters and the signed URL signature will match.