PHP默认会将Operate Code文件丢弃,缓存加速是将其保存下来,放置共享内存中,以便在下次调用该PHP页面时重用,避免相同代码的重复编译
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■ LAMP环境PHP解析原理
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Apache接收客户的PHP程序请求,并根据规则过滤之
Apache将PHP程序请求传递给PHP处理模块libphp5.so
PHP引擎定位磁盘上的PHP文件,并将其加载到内存中解析
PHP处理模块libphp5.so将PHP源码编译成opcode
PHP处理模块libphp5.so执行opcode,然后把opcode缓存起来
Apache接收客户端新的PHP程序请求,PHP引擎直接读取缓存执行opcode文件,并将结果返回
■ LNMP环境PHP解析原理
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Nginx接收客户端的PHP程序访问请求
Nginx根据扩展名等过滤规则将PHP程序请求传递给解析PHP的FCGI(PHP FPM)进程
PHP FPM进程调用PHP解析器读取站点磁盘上的PHP文件,并加载到内存中
PHP解析器将PHP程序编译成为opcode文件,然后把opcode缓存起来
PHP FPM引擎执行opcode树后,返回数据给Nginx,进而返回客户端
Nginx接收客户新的PHP程序请求,PHP FPM引擎就会直接读取缓存中的opcode并执行,将结果返回
■ 缓存加速插件安装配置(xcache)
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[root@Web_server src]# wget http://xcache.lighttpd.net/pub/Releases/3.2.0/xcache-3.2.0.tar.bz2
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[root@Web_server src]# tar xf xcache-3.2.0.tar.bz2
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[root@Web_server src]# cd xcache-3.2.0
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[root@Web_server xcache-3.2.0]# /usr/local/php/bin/phpize
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[root@Web_server xcache-3.2.0]# ./configure --enable-xcache --with-php-config=/usr/local/php/bin/php-config
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[root@Web_server xcache-3.2.0]# make && make install
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[root@Web_server xcache-3.2.0]# ll /usr/local/php/lib/php/extensions/no-debug-non-zts-20121212/
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total 2208
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-rwxr-xr-x 1 root root 1021684 Apr 13 10:33 opcache.a
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-rwxr-xr-x 1 root root 538161 Apr 13 10:33 opcache.so
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-rwxr-xr-x 1 root root 692628 Apr 18 09:44 xcache.so #<==生成xcache.so模块
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[root@Web_server xcache-3.2.0]# cat /usr/local/src/xcache-3.2.0/xcache.ini >> /usr/local/php/etc/php.ini
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[root@Web_server xcache-3.2.0]# tail -85 /usr/local/php/etc/php.ini | egrep -v "^;|^$"
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[xcache-common]
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extension = xcache.so
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[xcache.admin]
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xcache.admin.enable_auth = On
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xcache.admin.user = "mOo"
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xcache.admin.pass = "md5 encrypted password"
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[xcache]
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xcache.shm_scheme = "mmap"
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xcache.size = 256M
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xcache.count = 2
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xcache.slots = 8K
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xcache.ttl = 86400
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xcache.gc_interval = 3600
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xcache.var_size = 64M
#更改标红参数,生产环境根据硬件和业务数据来调整
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[root@Web_server xcache-3.2.0]# /usr/local/php/bin/php -v #检查配置
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PHP 5.5.31 (cli) (built: Apr 13 2016 10:29:58)
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Copyright (c) 1997-2015 The PHP Group
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Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
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with XCache v3.2.0, Copyright (c) 2005-2014, by mOo
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with XCache Cacher v3.2.0, Copyright (c) 2005-2014, by mOo
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[root@Web_server ~]# echo -n "szk" |md5sum
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[root@Web_server ~]# vim /usr/local/php/etc/php.ini #配置xcache用户密码
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xcache.admin.user = "szk"
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xcache.admin.pass = "005eff7dd9626f0c30f2eb8003ceafc9"
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[root@Web_server ~]# cp -a /usr/local/src/xcache-3.2.0/htdocs/ /data/www/xadmin
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[root@Web_server ~]# chown -R nobody.nobody /data/www/xadmin
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[root@Web_server ~]# /etc/init.d/php-fpm start
■ 缓存加速插件安装配置(OPcache)
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#若5.5版本,会自动安装opcache插件,编译时--enable=opcache启用
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[root@Web_server ~]# ll /usr/local/php/lib/php/extensions/no-debug-non-zts-20121212/
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-rwxr-xr-x 1 root root 538161 Apr 13 10:33 opcache.so
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[root@Web_server ~]# vim /usr/local/php/etc/php.ini #若编译没有启用,则在配置文件中添加下面内容即可
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zend_extension=opcache.so
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[opcache]
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opcache.memory_consumption=128
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opcache.interned_strings_buffer=8
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opcache.max_accelerated_files=4000
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opcache.revalidate_freq=60
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opcache.fast_shutdown=1
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opcache.enable=1
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opcache.enable_cli=1
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[root@Web_server ~]# /usr/local/php/bin/php -v
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PHP 5.5.31 (cli) (built: Apr 13 2016 10:29:58)
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Copyright (c) 1997-2015 The PHP Group
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Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
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with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies