(No version information available, might be only in CVS)
SWFFont->getWidth — Returns the string's width
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used 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.