require 'lib/Readability.inc.php';

$Readability     = new Readability($html, $html_input_charset); // default charset is utf-8
$ReadabilityData = $Readability->getContent(); // throws an exception when no suitable content is found

// You can see more params by var_dump($ReadabilityData);
echo "<h1>".$ReadabilityData['title']."</h1>";
echo $ReadabilityData['content'];