How to use phpQuery

use_phpquery.php

<?php
/**
 * User: videde
 * Date: 8/21/13
 * Time: 1:41 AM
 */
require('phpQuery/phpQuery.php');
function action() {
    $content = ""; // content of web page
    $doc = phpQuery::newDocument($content);
    $as = pq('a.rg_l');
    foreach($as as $a) {
        $href = pq($a)->attr('href');
        $divs = pq('div', $a);
    }

}