How to get a url from the url and then jump to the url

How do I get a url from a url and then jump to it like there is a url in the form of a http://www.abcd.org/go.php? & Amp; from = source & amp; go = www.xyz.edu.cn ?, How does hea get a url from the url and then jump to the url
For example, there is a url in the form of a http://www.abcd.org/go.php? & From = source & go = www.xyz.edu.cn, how do I jump to the url represented by the go parameter when accessing this url?

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Header ("location:". $ _ GET ['go']);
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PHP code

$ Go = 'http: // '. $ _ GET ['go']; echo"