如何修改href链接（scraper）

Question

I'm scraping a page, however before my content is echoed I would like to edit the link.

What is the best way to do this?

I'm currently using Simple HTML DOM Parser:

// create HTML DOM
$html = file_get_html('http://myurl.com');
// remove all image
  foreach($html->find('img') as $e)
 $e->outertext = '';
foreach($html->find('font') as $e)
$e->outertext = '';
// find all td tags with attribite align=center
foreach($html->find('td[align=left]', 2) as $e)
   echo $e->innertext;

There is this bit in one of the URLs:

<a target="retailer" href="/cgi-bin/redirect.cgi?name=Storm%20Computers&amp;linkid=2&amp;newurl=http%3A%2F%2Fwww.stormcomputers.com.au%2Fcatalog%2Findex.php%3FcPath%3D38_364&amp;query=sandy%20bridge&amp;uca=208-0-0&amp;kwi=&amp;rpos=2" title="Storm Computers: Click to see item">$149.00</a>

I would like to change this to

<a href="http%3A%2F%2Fwww.stormcomputers.com.au%2Fcatalog%2Findex.php%3FcPath%3D38_364&amp;query=sandy%20bridge&amp;uca=208-0-0&amp;kwi=&amp;rpos=2">$149.00</a>

(ie. just after &newurl=)

Thanks.

Answer 1

I'm not familiar with the parser you're using, but something like this might work:

foreach ($html->find('a') as $link) {
    $urlparts = parse_url($link->href);
    $query = parse_str($urlparts['query'], $params);

    if (isset($params['newurl'])) {
        $link->href = $params['newurl'];
    }
}