Hi,

I'd like to assign a class to every table in my HTML output. I've got PHP filters working but can't figure out how to manipulate the AST to do what I want.

Building on an example PHP filter, I have:

Pandoc_Filter::toJSONFilter(function ($type, $value, $format, $meta) {
    if ('Str' == $type) {
        // use mb_convert_case instead of ucwords so filter works with unicode
        return mb_convert_case($value, MB_CASE_LOWER, "UTF-8");
    }
    if ('Table' == $type) {
        $attrs = array('classes' => 'table');
        // return ???
    }
});

The 'Str' manipulation works as expected, and any code I put into the 'Table' section is executed, but I can't get started on how to proceed from there. Any pointers would be very welcome!