I suppose something like this:

location ~* \.php(/|$) { fastcgi_pass 127.0.0.1:50000; fastcgi_index index.php; set $path_info ""; if ($uri ~ \.php(/.+)$) { set $path_info $1; } fastcgi_param SCRIPT_FILENAME /srv/www/helpdesk$fastcgi_script_name; fastcgi_param PATH_INFO $path_info; fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; }