''object **Text_Wiki** (array **default rule set** default null)''Instantiates a Text_Wiki object, optionally with a user-defined rule set.<code php>

require_once 'Text/Wiki.php';
$wiki =& new Text_Wiki();
</code>To re-define the default rule set, pass a sequential array of rule names as the only parameter to Text_Wiki.<code php>

// define a rule set that only looks for bold, italic, and
// teletype inline markup

$rules = array(
    'strong',
    'emphasis',
    'tt'
)

$wiki =& new Text_Wiki($rules);
</code>