Nginx config file isn't locating my Codeigniter/PHP app - php

Question

I can't figure out how to make the Nginx config file locate my Codeigniter app. Serving PHP on this server is not the problem b/c if I put a php file in my root directory, I can echo "hello world";.
Here's my Nginx config file which is nearly verbatim from this tutorial. Note that I've manipulated many of these parameters and none had an effext so I'm wondering whether I need to look beyond this file to get it to work?:
server {
listen 80;
server_name www.mysite.com mysite.com;
root /var/www;
index index.html index.php index.htm;
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
location / {
try_files $uri $uri/ /index.php;
}
location ~* \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_split_path_info ^(.+\.php)(.*)$;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
}
}
I've been thinking all along this is a simple path issue b/c Codeigniter has a somewhat confusing routing structure but just can't see the problem with my config. Thoughts?

Answer 1

Everything up top matches what I have for a CI project, then this is my location config:
location ~ \.php$ {
include /etc/nginx/fastcgi_params;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
}
Not sure if by removing the wildcard * would help, or getting rid of the split_info param...