use Modern::Perl;
use URI::Escape qw/uri_escape/;
use HTML::HTML5::Entities qw/encode_entities/;
my @t   = qw(name John number 7 status unknown);
my %th  = @t;   # cast to hash
my $url = 'show_person.cgi?' .
    join '&',
    map { sprintf '%s=%s', uri_escape($_), uri_escape($th{$_}) }
    keys %th;
printf(
    '<a href="%s">%s</a>',
    encode_entities($url),
    encode_entities($th{name}),
    );