方式一：采用tcp：port模式
apache配置：
#Tell the PHP interpreter to handle files with a .php extension.
#Proxy declaration
<Proxy "fcgi://127.0.0.1">
</Proxy>
<FilesMatch "\.php$">
SetHandler "proxy:fcgi://127.0.0.1:9000"
</FilesMatch>
#
#Allow php to handle Multiviews
#
AddType text/html .php
#
#Add index.php to the list of files that will be served as directory
#indexes.
#
DirectoryIndex index.php
#
#Uncomment the following lines to allow PHP to pretty-print .phps
#files as PHP source code:
#echo php_sapi_name();//fpm-fcgi
<FilesMatch \.phps$>
SetHandler application/x-httpd-php-source
</FilesMatch>
php-fpm 配置：
listen = 127.0.0.1:9000
方式二；采用unix domain socket模式
#Tell the PHP interpreter to handle files with a .php extension.
#Proxy declaration
<Proxy "unix:/var/run/php-fpm/default.sock|fcgi://php-fpm">
#we must declare a parameter in here (doesn't matter which) or it'll not register the proxy ahead of time
ProxySet disablereuse=off
</Proxy>
#Redirect to the proxy
<FilesMatch \.php$>
SetHandler proxy:fcgi://php-fpm
</FilesMatch>
#
#Allow php to handle Multiviews
#
AddType text/html .php
#
#Add index.php to the list of files that will be served as directory
#indexes.
#
DirectoryIndex index.php
#
#Uncomment the following lines to allow PHP to pretty-print .phps
#files as PHP source code:
#echo php_sapi_name();//fpm-fcgi
<FilesMatch \.phps$>
SetHandler application/x-httpd-php-source
</FilesMatch>
php-fpm 配置：
listen = /var/run/php-fpm/default.sock
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apache的proxy关于fcgi协议相关配置文档，官方文档：https://httpd.apache.org/docs/2.4/mod/mod_proxy_fcgi.html
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