I wanted to enable zend opcache on php 5.5 and I wasn't sure if centminmod requires anything different to make this work. Is option 12 needed with php5.5 since it already has it included? On a test vps I did a fresh install with php 5.5 and did option 12. In php.ini I see options to enable it. I set them both to 1. Code: [opcache] ; Determines if Zend OPCache is enabled ;opcache.enable=1 ; Determines if Zend OPCache is enabled for the CLI version of PHP ;opcache.enable_cli=1 Is this all that is needed?