Hello friend,
Above link will provide you solution. Here i am posting you some Mod rewrite tips and tricks
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Tip 1
instant 301 from old dynamic url to new static url
(will only work if you use the exact variables from the dynamic url)
Old dynamic url:
Code:
www.somesite.com/catalog.php?cat=widgets&product_id=1234
New static url:
Code:
www.somesite.com/catalog/widgets-1234.html