title: PHP XPath query returns nothing
body: <p>I've been recently playing with DOMXpath in PHP and had success with it, trying to get more experience with it I've been playing grabbing certain elements of different sites. I am having trouble getting the weather marker off of <a href="http://www.theweathernetwork.com/weather/cape0005" rel="nofollow">http://www.theweathernetwork.com/weather/cape0005</a> this website.</p>
  
  <p>Specifically I want </p>
  
  <pre><code>//*[@id='theTemperature']
  </code></pre>
  
  <p>Here is what I have</p>
  
  <pre><code>$url = file_get_contents('http://www.theweathernetwork.com/weather/cape0005');
  
  $dom   = new DOMDocument();
  @$dom-&gt;loadHTML($url);
  $xpath = new DOMXPath($dom);
  $tags  = $xpath-&gt;query("//*[@id='theTemperature']");
  foreach ($tags as $tag){
      echo $tag-&gt;nodeValue;
  }
  </code></pre>
  
  <p>Is there something I am doing wrong here? I am able to produce actual results on other tags on the page but specifically not this one.</p>
  
  <p>Thanks in advance.</p>