Help preg_replace with Non-English character

Hi all,

Just a question, I want to replace some Chinese characters with
preg_replace().

But it does not work.

The string is

$str = 'test<<你好>>http://www.phparch.cn/ 完成';

The ideal output is :
test<a href="http://www.phparch.cn";>你好</a> 完成

Any suggestion will be greatly appreciated.

--
Regards,
Shelley

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