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function to decode url percent encoding


From: Xah Lee
Subject: function to decode url percent encoding
Date: Wed, 08 Dec 2010 15:08:50 -0000
User-agent: G2/1.0

is there a function that decode the url percent encoding?

e.g.
http://en.wikipedia.org/wiki/Sylvester%E2%80%93Gallai_theorem

should become

http://en.wikipedia.org/wiki/Sylvester–Gallai_theorem

that's a EN DASH, unicode 8211.

but that just unhex, and generate gibberish if the url contain unicode
chars.

thanks.

  Xah
∑ http://xahlee.org/

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