nginx configuration root - nginx

Question

Help me to configure nginx index file option, please.
Any requests except the main page i want to redirect to some handler file and the main page request to index.html file.
Something like this:
example.com/123/ -> /root/handler.php
example.com/123.php -> /root/handler.php
example.com/ -> /root/index.html
Answer
i use this config
listen 80;
server_name domain.com;
root /srv/http/domain.com;
index index.html;
charset utf-8;
access_log /var/log/http/x_nginx_access.log main;
error_log /var/log/http/x_nginx_error.log warn;
auth_basic "Restricted access";
auth_basic_user_file /srv/http/$host/.htpasswd;
location = / {
index index.html;
}
location / {
try_files $uri $uri/ /handler.php?$args;
}
location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
expires 24h;
log_not_found off;
}
location = /favicon.ico {
log_not_found off;
access_log off;
}
location = /robots.txt {
allow all;
log_not_found off;
access_log off;
}
location ~ /\.ht {
deny all;
}
location ~ \.php {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Request-Filename $request_filename;
fastcgi_param SCRIPT_FILENAME /srv/http/$host$fastcgi_script_name;
fastcgi_param QUERY_STRING $query_string;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
proxy_read_timeout 512;
fastcgi_pass 127.0.0.1:9000;
include fastcgi_params;
}