Sorry, but even that's untrue. vroom likely meant to enclose his code in backticks (`), not single quotes. That solution would've worked. But using system will only give you the return value from the system call instead of the output (although you'll likely get the output on your screen, it won't be stored in $webpage, which is the whole point here).
What you want is qx, or backticks. They will return the output of the system call: