让nginx支持CodeIgniter框架

在nginx环境下默认是不支持codeigniter框架的，如果需要在nginx环境下运行codeigniter框架，需要对系统环境做些修改。

修改方法：

1、修改CI项目配置文件，修改 uri_protocol 为 path_info

$config['uri_protocol']	= 'PATH_INFO';

location /index.php{
    fastcgi_pass  unix:/tmp/php-cgi.sock;
    fastcgi_param SCRIPT_FILENAME /home/wwwroot/index.php;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    fastcgi_split_path_info ^(.+\.php)(.*)$;
    fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
    include fcgi.conf;
}

如果有多个项目需要根据入口文件添加相应项目配置，如：有前、后台2个项目，入口文件分别为index.php、admin.php，这时需要添加：

location /index.php{
    fastcgi_pass  unix:/tmp/php-cgi.sock;
    fastcgi_param SCRIPT_FILENAME /home/wwwroot/index.php;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    fastcgi_split_path_info ^(.+\.php)(.*)$;
    fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
    include fcgi.conf;
}
location /admin.php{
    fastcgi_pass  unix:/tmp/php-cgi.sock;
    fastcgi_param SCRIPT_FILENAME /home/wwwroot/admin.php;
    fastcgi_param PATH_INFO $fastcgi_path_info;
    fastcgi_split_path_info ^(.+\.php)(.*)$;
    fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
    include fcgi.conf;
}

但有时我们发现运行项目的过程中出现 No input file specified 的错误，原因是因为php没有开启对pathinfo的支持，只需要修改相应PHP配置项就可以了。

把：

cgi.fix_pathinfo=0

cgi.fix_pathinfo=1