simple_html_dom::clear PHP Method

    function clear()
    {
        foreach ($this->nodes as $n) {
            $n->clear();
            $n = null;
        }
        // This add next line is documented in the sourceforge repository. 2977248 as a fix for ongoing memory leaks that occur even with the use of clear.
        if (isset($this->children)) {
            foreach ($this->children as $n) {
                $n->clear();
                $n = null;
            }
        }
        if (isset($this->parent)) {
            $this->parent->clear();
            unset($this->parent);
        }
        if (isset($this->root)) {
            $this->root->clear();
            unset($this->root);
        }
        unset($this->doc);
        unset($this->noise);
    }

function clubURL($url)
{
    $html = scraperwiki::scrape($url);
    $dom = new simple_html_dom();
    $dom->load($html);
    $clubName = trim(str_replace(' ', '', $dom->find('table', 0)->find('tr', 2)->plaintext));
    $formatClubName = trim(preg_replace('/\\s+/', ' ', $clubName));
    $_GLOBAL['clubs'][] = $formatClubName;
    echo 'running ' . $formatClubName . "\n";
    foreach ($dom->find('table', 2)->find('tr') as $row) {
        if (is_numeric($row->find('td', 0)->plaintext)) {
            $year = trim($row->find('td', 0)->plaintext);
            $position = trim(str_replace(' ', '', $row->find('td', 1)->plaintext));
            if (trim($position) == 'Champion') {
                $position = 1;
            }
            $leagueLevel = trim($row->find('td', 2)->plaintext);
            $overallPosition = trim($row->find('td', 3)->plaintext);
            $avgAttendance = trim(str_replace('.', '', $row->find('td', 4)->plaintext));
            $totalAttendance = trim(str_replace('.', '', $row->find('td', 12)->plaintext));
            $dataset = array('club' => $formatClubName, 'year' => $year, 'finishedPosition' => $position, 'league' => $leagueLevel, 'overallPosition' => $overallPosition, 'avgAttendance' => $avgAttendance, 'totalAttendance' => $totalAttendance);
            scraperwiki::save(array('club', 'year'), $dataset);
        }
    }
    /*
     * The next to lines stop a memory leak in Simple XML as per http://simplehtmldom.sourceforge.net/manual_faq.htm#memory_leak
     */
    $dom->clear();
    unset($dom);
}