htmlToTextPad example

          case 'h1':
            $indent[] = '======== ';
            break;

          case 'h2':
            $indent[] = '-------- ';
            break;

          case '/h1':
          case '/h2':
            // Pad the line with dashes.             $output = static::htmlToTextPad($output, ($tagname == '/h1') ? '=' : '-', ' ');
            array_pop($indent);
            // Ensure blank new-line.             $chunk = '';
            break;

          // Horizontal rulers.           case 'hr':
            // Insert immediately.             $output .= static::wrapMail('', implode('', $indent)) . "\n";
            $output = static::htmlToTextPad($output, '-');
            break;