using alias to send certain URL to different php directory - nginx

Question

I am currently sending all request with '.php' to the php engine using the following:
root /var/www/public;
index index.php;
location / {
try_files $uri $uri/ /index.php;
}
location ~ \.php$ {
try_files $uri =404;
fastcgi_pass php:9000;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PHP_VALUE "error_log=/var/log/nginx/php_errors.log";
fastcgi_buffers 16 16k;
fastcgi_buffer_size 32k;
}
I would like to get all requests to /login/... to be sent to a different directory on the php server. I gather that alias and try_files don't work together. I have tried using another 'root', but it doesn't work:
location ^~ /login/ {
root /var/www/login/etc/;
try_files $uri $uri/ /login$is_args$args;
}
location / {
try_files $uri $uri/ /index.php;
}
location ~ \.php$ {
try_files $uri =404;
fastcgi_pass php:9000;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PHP_VALUE "error_log=/var/log/nginx/php_errors.log";
fastcgi_buffers 16 16k;
fastcgi_buffer_size 32k;
}
How can I get this to work so all /login/... requests end up being served from /var/www/login/etc directory on php. Thanks.

Answer 1

Try this,
http {
...
map $request_uri $rot{
"~ /login" /var/www/login/etc/;
default <insert_default_root>;
}
server {
...
root $rot;
...
location / {...}
location ~ \.php$ {...}
...
}
...
}