textwidth madness

[coreys]

I'm having some very strange issues with the textwidth function. If I try and input a variable into the function like this:

PHP Code:

foo = "some text here";
len = textwidth(1, "Verdana", "b", foo); 


it will always output the same value no matter what the text is in the variable (in my case, 74).

However, if I use a string literal, like this:

PHP Code:

len = textwidth(1, "Verdana", "b", "some text here"); 


It will work properly.

Anybody know what I'm doing wrong here? I've checked the variables value over and over, it's nothing to do with that, I don't think.