PHP-FPM zend opcache

I am updating to php 7.0.13 and it asked me if I wanted to use zend opcache and I said yes. I wasn't quite sure about it, so I am asking here.

Also, when I updated php I said that I wanted it to do all Yum checks and it installed some stuff. I couldn't read exactley what it was because it was going fast, but was it installed before?

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I noticed that there are libressl updates available. Should I update that also? I don't use SSL.

 

I tried to update it with the menu option 23 and then option 2, but it said that there were no updates available at this time.

 

I am on nginx 1.11.5. I said for it to update to that. Does that recompile it?

 

So I tried that, but the wifi kept getting disconnected and the update failed. I am trying it again.

 

Ok, it is done, but how do I check the libressl version?

 

at the bottom it said this
-with-openssl=../libressl-2.4.4