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Or just include the line in the html section of your php file.
Now in the rest of your html you can reference the functions in utils.js.
Your doing redirects.
Use php to build a redirect header.
print "Location: 301 [example.com...]
Or write print an html redirect.
<meta http-equiv="Refresh" content="0;url=http://www.example.com/page.html?id=id">
<a href='http://www.example.com/'>Moved here</a> </body>
Or you could use mod_rewrite to do similar things... do a site search for mod_rewrite here and you will masses of uses that you can put it to.