使用attribute定位xml节点，然后使用simpleXML返回不同属性的值

Question

I have some xml:

<release id="2276808" status="Accepted">
    <images>
         <image height="600" type="primary" uri="http://s.dsimg.com/image/R-2276808-1302966902.jpeg" uri150="http://s.dsimg.com/image/R-150-2276808-1302966902.jpeg" width="600"/>                       
         <image height="600" type="secondary" uri="http://s.dsimg.com/image/R-2276808-1302966912.jpeg" uri150="http://s.dsimg.com/image/R-150-2276808-1302966912.jpeg" width="600"/>  
         <image height="600" type="secondary" uri="http://s.dsimg.com/image/R-2276808-1302966919.jpeg" uri150="http://s.dsimg.com/image/R-150-2276808-1302966919.jpeg" width="600"/><image height="600" type="secondary" uri="http://s.dsimg.com/image/R-2276808-1302966929.jpeg" uri150="http://s.dsimg.com/image/R-150-2276808-1302966929.jpeg" width="600"/>
    </images> ...

I'm using SimpleXML and php 5.3.

I want to target the image node where type="primary" and return the value for the uri attribute.

The closest I've gotten is:

$xml->xpath('/release/images/image[@type="primary"]')->attributes()->uri;

which fails because you cannot call attribute() method after xpath.

Answer 1

How about this:

$xml = new SimpleXMLElement(file_get_contents('feed.xml'));
$theUriArray = $xml->xpath('/release/images/image[@type="primary"]');
$theUri = $theUriArray[0]->attributes()->uri;

echo($theUri);