Here are two methods to include PHP in templates using XML-like tags.
Method One:
In function_phpdig_form.php, look for the following:
$result['form_head'] = "<form action='$result_page' method='get'>
and right before it, insert the following:
$result['put_unique_name_here'] = $do_php_here;
and then in the template, use the following:
<phpdig:put_unique_name_here/>
Method Two:
In search_function.php, look for the following:
$timer->start('Template parsing');
and right after it, insert the following:
$put_unique_name_here = $do_php_here;
and then in search_function.php, look for the following:
$t_mstrings = compact('title_message', // and so forth
and 'put_unique_name_here' into the line like so:
$t_mstrings = compact('put_unique_name_here','title_message', // and so forth
and then in the template, use the following:
<phpdig:put_unique_name_here/>