Question

I am after a specific value from a webapge; the product name that is in the h1 tag:

<div id="extendinfo_container">
  <a href="/someproduct.html"><h1><strong>Product Name</strong></h1></a>
  <div style="font-size:0;height:4px;"></div>
  <p class="text_breadcrumbs">
  <a href="/Our-Brands.html" target="_self"><img src="arrow_091.gif" align="absmiddle"/></a>
  <a href="/someproduct.html" target="_self" class="link_breadcrumbs">Product Name</a><img src="arrow_091.gif" align="absmiddle"/>
  <strong>Product Name</strong>
  <div class="dotted_line_blue">
    <img src="theme_shim.gif" height="1" width="100%" alt=" " />
  </div>
</div>

This is a poorly structured website with more than one h1 so I cannot simply do getElementById(‘h1’).

I want to be as specific as possible in which element I get and this is the code I have:

$doc = new DOMDocument();
@$doc->loadHTML(file_get_contents('http://url/to/website'));

// locate <div id="extendinfo_container"><a><h1><strong>(.*)</strong></h1></a> as product name
$x = new DOMXPath($doc);
$pName = $x->query('//div[@id="extendinfo_container"]/a/h1/strong');
var_dump($pName->nodeValue);

This is return null. What query do I need to use to get the content I want?

Answer 1

query() returns a DOMNodeList, which doesn’t have a nodeValue property. You have to select one element (i.e. the first):

$pName = $x->query('//div[@id="extendinfo_container"]/a/h1/strong')->item(0);

Or iterate over it:

foreach( $pName as $el) {
    var_dump( $el->nodeValue);
}

Either one of these will give you access to a DOMNode, which is what you’re looking for.