Expect/Tcl -- Need to access return value of script

Hi, I have an expect script that rlogin's to another system, and executes a few remote commands on that server. I need to capture the return value of one of the commands given, and then return that value to another script (the one that called the expect script). Here is a rough outline of my expect script:

#!/usr/bin/expect -f

set prompt "(%|#|\\$|%]) $"
catch {set prompt $env(EXPECT_PROMPT)}
set timeout 10
set username [lindex $argv 0]
set pword [lindex $argv 1]
set arg1 [lindex $argv 2]
set arg2 [lindex $argv 3]
set host "theserver@thehost.com"
spawn rlogin -l $username $host
expect "Password:*"
send "$pword\r" //Connected to remote host
expect -re $prompt
send "/path/to/the/script $arg1 $arg2 .. need return value of this script
expect -re $prompt
send "exit\r"
//need to return the return value found
exit

basically it is like this...I call the expect script from php (via exec), it runs on the same server as the webserver, then rlogin's to the other server and runs the scripts...I need to return the return value back to php, can I do this?
Thanks!