1. Go to 'admin > webserver configure > multiple php install > (select all php) > update' (install all php version will be process in background and need some minutes to finished'; the some way with 'sh /script/phpm-all-install' from ssh). And then, select 'php56m' in 'php used'
2. With file manager, go to 'admin > servers > (localhost) > file manager > (go to /opt/php56m/etc/php.d'). Copy '10-opcache.nonini' to '10-opcache_used.ini'. And then restart web with 'sh /script/restart-web -y' from ssh or 'admin > servers > (localhost) > command center'.