I have some scripts that utilize some of the openssl PHP functions, such as openssl_opbkdf2. I am migrating from an Ubuntu server to a newly-created CentOS 7 server with a fresh install of the entire LAMP stack. Despite hours and hours of googling, I am unable to figure out how to enable these PHP functions. Here is a link that illustrates my problem. And here is a link that shows my current configuration.
As is plain from the info list, OpenSSL is installed and working. Every indication I can find leads me to believe these commands should be available. But they're not! What am I missing?