Simply escape them with a backslash:

$command = "rm \"/here/$filename\"";
[download]

(And as an aside, why don't you want to use unlink? It's going to be a heck of a lot safer than using this type of code.)

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Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain
"I can see my house from here!"
It's not what you know, but knowing how to find it if you don't know that's important