(PHP 4 >= 4.0.5)
SWFFont->getWidth() — Returns the string's width
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.
swffont->getwidth() returns the string string 's width, using font's default scaling. You'll probably want to use the swftext() version of this method which uses the text object's scale.