A clickable link in an HTML page needs to be HTML-entitized. If you mix that in with the problem of making a link that provides query form element values, you've got a mess.

So, steal this recipe!

use URI;
use HTML::Entities;
my $uri = URI->new("http://base.address/cgi/foo");
$uri->query_form( key1 => $value1, key2 => $value2, key3 => $value3 );
print '<a href="', encode_entities("$uri"), '">submit your query!</a>'
+;

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