如何解决Nginx和CI框架出现404错误

server {
listen ;
server_name example.com;
root /data/wwwroot/example/ index index.php index.html index.htm;
location ~* \.(css|js|swf|htm|jpg|png|gif|json|atlas)?$ {
expires d;
add_header Pragma public;
add_header Cache-Control "public";
}
location /controller-class/ {
if (!-e $request_filename) {
rewrite ^/controller-class/(.*)$ /controller-class/index.php?q=$uri&$args;
}
}
location ~ \.php$ {
fastcgi_pass ...:;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PHP_VALUE open_basedir=$document_root:/tmp/:/proc/;
include fastcgi_params;
}
}