use HTML::Template;
my $tmpl = HTML::Template->new(
scalarref => \do { local $/; },
die_on_bad_params => 0,
loop_context_vars => 1,
filter => sub {
my $s=shift;
$$s=~s/%~([^~]+)~%//g;
},
);
$tmpl->param( userid => 99999 );
$tmpl->param( username => 'foo' );
print $tmpl->output;
__DATA__
%~username~%
is easier to edit than
">