$href="javascript:calculator('" . $values[0] . "', '" . $values[1] . "');";

if ($print) {
$row->text = preg_replace( '{'. $match .'}', $href, $row->text );
}

This builds a string from the values we've parsed out and then replaces the occurances of {calc xyz} in the article text ($row->text).

return true;


Once all of our processing is done we return "true" to tell Joomla everything we've done worked and we've received no errors.