nginx doesn't parse php request - php

Question

env:
ubuntu 9.10 /
use gotdeb source /
php version 5.3.1 /
php5-fpm installed /
php5-fpm is running , and listening 9000 port test by 2 commands below
pgrep php5-fpm
telnet localhost 9000
however if I visit from anthor computer in LAN ,using this address
http://192.168.1.103/index.php
the browser ask me to save this index.php , but if visit index.php , everything goes well
sites-enabled/default file content
env:
ubuntu 9.10 /
use gotdeb source /
php version 5.3.1 /
php5-fpm installed /
php5-fpm is running , and listening 9000 port test by 2 commands below
pgrep php5-fpm
telnet localhost 9000
however if I visit from anthor computer in LAN ,using this address
http://192.168.1.103/index.php
the browser ask me to save this index.php , but if visit index.html , everything goes well
sites-enabled/default file content
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000
fastcgi_index index.php
fastcgi_param SCRIPT_FILENAME /var/www/$fastcgi_script_name
include fastcgi_params
}

Answer 1

A common pitfall is when your code is using short open tags <? instead of <?php and it's not enabled in php.ini on a fresh install so it won't get parsed.
To enable it set short_open_tag=On

Answer 2

It seems you need to set your website's index.
You can see a full example on nginx's official wiki, but here's the relevant part:
location / {
index index.html index.htm index.php;
}
As you see, the virtual host needs to know it's supposed to process index.php when accessing the website via it's root dir (i.e. http://domain.com/ or http://domain.com/site/), with no file specified.

Answer 3

I do have an index:
location / {
index index.php;
}
I am not using <? PHP tags.