php5.3 LNMP集成环境安装opcache
大家知道目前PHP的缓存插件一般有三个：APC、eAccelerator、XCache，但未来它们可能都会消失，因为PHP 5.5已经集成Zend Opcache，功能和前三者相似但又有少许不同，缓存速度据说比它们更快。
这几个PHP加速插件的主要原理都相同，就是把PHP执行后的数据缓冲到内存中从而避免重复的编译过程，能够直接使用缓冲区已编译的代码从而提高速度，降低服务器负载，它们的效率是显而易见的，像drupal这种庞大的CMS，每次打开一个页面要调用数十个PHP文件，执行数万行代码，效率可想而知，在安装APC等加速器后打开页面的速度明显加快。
下面是在本人虚拟机的LNMP环境下安装opcache过程，记录一下。
wget https://pecl.php.net/get/zendopcache-7.0.4.tgztar zxvf zendopcache-7.0.4.tgzcd zendopcache-7.0.4./configure --with-php-config=/usr/local/php/bin/php-configmakemake install
之后修改php.ini
vim /usr/local/php/etc/php.ini 添加如下内容：zend_extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/opcache.soopcache.memory_consumption=128opcache.interned_strings_buffer=8opcache.max_accelerated_files=4000opcache.revalidate_freq=60opcache.fast_shutdown=1opcache.enable_cli=1
最后重启php-fpm即可。 /etc/init.d/php-fpm restart
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