PHP開啟緩存加速
PHP默認會將Operate Code文件丟棄，緩存加速是將其保存下來，放置共享內存中，以便在下次調用該PHP頁面時重用，避免相同代碼的重復編譯
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■ LAMP環境PHP解析原理
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Apache接收客戶的PHP程序請求，並根據規則過濾之
Apache將PHP程序請求傳遞給PHP處理模塊libphp5.so
PHP引擎定位磁盤上的PHP文件，並將其加載到內存中解析
PHP處理模塊libphp5.so將PHP源碼編譯成opcode
PHP處理模塊libphp5.so執行opcode，然後把opcode緩存起來
Apache接收客戶端新的PHP程序請求，PHP引擎直接讀取緩存執行opcode文件，並將結果返回
■ LNMP環境PHP解析原理
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Nginx接收客戶端的PHP程序訪問請求
Nginx根據擴展名等過濾規則將PHP程序請求傳遞給解析PHP的FCGI（PHP FPM）進程
PHP FPM進程調用PHP解析器讀取站點磁盤上的PHP文件，並加載到內存中
PHP解析器將PHP程序編譯成為opcode文件，然後把opcode緩存起來
PHP FPM引擎執行opcode樹後，返回數據給Nginx，進而返回客戶端
Nginx接收客戶新的PHP程序請求，PHP FPM引擎就會直接讀取緩存中的opcode並執行，將結果返回
■ 緩存加速插件安裝配置（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 -
[root@Web_server src]# tar xf xcache-3.2.0.tar.bz2 -
[root@Web_server src]# cd xcache-3.2.0 -
[root@Web_server xcache-3.2.0]# /usr/local/php/bin/phpize -
[root@Web_server xcache-3.2.0]# ./configure --enable-xcache --with-php-config=/usr/local/php/bin/php-config -
[root@Web_server xcache-3.2.0]# make && make install -
[root@Web_server xcache-3.2.0]# ll /usr/local/php/lib/php/extensions/no-debug-non-zts-20121212/ -
total 2208 -
-rwxr-xr-x 1 root root 1021684 Apr 13 10:33 opcache.a -
-rwxr-xr-x 1 root root 538161 Apr 13 10:33 opcache.so -
-rwxr-xr-x 1 root root 692628 Apr 18 09:44 xcache.so #<==生成xcache.so模塊 -
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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 -
[root@Web_server xcache-3.2.0]# tail -85 /usr/local/php/etc/php.ini | egrep -v "^;|^$" -
[xcache-common] -
extension = xcache.so -
[xcache.admin] -
xcache.admin.enable_auth = On -
xcache.admin.user = "mOo" -
xcache.admin.pass = "md5 encrypted password" -
[xcache] -
xcache.shm_scheme = "mmap" -
xcache.size = 256M -
xcache.count = 2 -
xcache.slots = 8K -
xcache.ttl = 86400 -
xcache.gc_interval = 3600 -
xcache.var_size = 64M
#更改標紅參數，生產環境根據硬件和業務數據來調整
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[root@Web_server xcache-3.2.0]# /usr/local/php/bin/php -v #檢查配置 -
PHP 5.5.31 (cli) (built: Apr 13 2016 10:29:58) -
Copyright (c) 1997-2015 The PHP Group -
Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies -
with XCache v3.2.0, Copyright (c) 2005-2014, by mOo -
with XCache Cacher v3.2.0, Copyright (c) 2005-2014, by mOo -
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[root@Web_server ~]# echo -n "szk" |md5sum -
[root@Web_server ~]# vim /usr/local/php/etc/php.ini #配置xcache用戶密碼 -
xcache.admin.user = "szk" -
xcache.admin.pass = "005eff7dd9626f0c30f2eb8003ceafc9" -
[root@Web_server ~]# cp -a /usr/local/src/xcache-3.2.0/htdocs/ /data/www/xadmin -
[root@Web_server ~]# chown -R nobody.nobody /data/www/xadmin -
[root@Web_server ~]# /etc/init.d/php-fpm start
■ 緩存加速插件安裝配置（OPcache）
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#若5.5版本，會自動安裝opcache插件，編譯時--enable=opcache啟用
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[root@Web_server ~]# ll /usr/local/php/lib/php/extensions/no-debug-non-zts-20121212/ -
-rwxr-xr-x 1 root root 538161 Apr 13 10:33 opcache.so -
[root@Web_server ~]# vim /usr/local/php/etc/php.ini #若編譯沒有啟用，則在配置文件中添加下面內容即可 -
zend_extension=opcache.so -
[opcache] -
opcache.memory_consumption=128 -
opcache.interned_strings_buffer=8 -
opcache.max_accelerated_files=4000 -
opcache.revalidate_freq=60 -
opcache.fast_shutdown=1 -
opcache.enable=1 -
opcache.enable_cli=1 -
[root@Web_server ~]# /usr/local/php/bin/php -v -
PHP 5.5.31 (cli) (built: Apr 13 2016 10:29:58) -
Copyright (c) 1997-2015 The PHP Group -
Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies -
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies
PHP開啟緩存加速