topr8 - 7:12 am on Apr 3, 2013 (gmt 0)
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.
it's first thing in the morning for me so i might have misunderstood you lucy24 - but from what you are saying you misunderstand the canonical tag.
it should be used like this:
<link rel="canonical" href="http://www.example.com/mypage.html">
and it should tell google that if the page has paramaters to treat the page as though it was without parameters.
calling php html and then turning around and attaching parameters is itself so silly
i would agree with this though, i would have thoguth a basic rule could be to ignore parameters with and htm/l extension