The software I am using (Prestashop) has suddenly started using the openssl_pkey_new() command.
The problem with that PHP command is that it needs a valid path to the openssl.cnf file. There is such a file in the /xampp/apache/conf directory. However, obviously no valid path to that file is available as openssl_pkey_new() returns an error on my installation.
My question is what is the best way to fix that. The PHP manual mentions something about Windows environment variables. However, I would rather not use those as I maintain several Xampp installations for different PHP versions.