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[edited by: goodroi at 11:23 am (utc) on Apr 2, 2013]
[edit reason] Please read the forum charter [/edit]
You can add a rel="canonical" tag to the page
First, there are so many who thought .html was better than .php (and may still be) eliminating .html with a parameter would be silly since people thought they would do better by parsing .htm and .html pages as php and using parameters on them.
Adding "rel='canonical'" won't do a particle of good if it was a static html page to start with, meaning that the parameters just go along for the ride and now every version of the page is calling itself canonical.
calling php html and then turning around and attaching parameters is itself so silly