操作系统是Centos 6 w / Apache 2.15，并且使用以下存储库安装了PHP。
[root@devserver drupal-8.1.1]# yum info php55u
Loaded plugins: fastestmirror, priorities, security
Loading mirror speeds from cached hostfile
* base: mirrors.xmission.com
* epel: mirror.cpsc.ucalgary.ca
* extras: linux.mirrors.es.net
* ius: mirrors.kernel.org
* updates: mirror.sesp.northwestern.edu
1704 packages excluded due to repository priority protections
Installed Packages
Name : php55u
Arch : x86_64
Version : 5.5.35
Release : 1.ius.centos6
Size : 9.0 M
Repo : installed
From repo : ius
Summary : PHP scripting language for creating dynamic web sites
URL : http://www.php.net/
License : PHP and Zend and BSD
Description : PHP is an HTML-embedded scripting language. PHP attempts to make
: it easy for developers to write dynamically generated web pages.
: PHP also offers built-in database integration for several
: commercial and non-commercial database management systems, so
: writing a database-enabled webpage with PHP is fairly simple. The
: most common use of PHP coding is probably as a replacement for CGI
: scripts.
:
: The php package contains the module (often referred to as mod_php)
: which adds support for the PHP language to Apache HTTP Server.
[root@devserver drupal-8.1.1]#
我的phpinfo没有列出OPcache。它也不在我的php.ini文件中。
如何启用它？