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What am I doing wrong with xpath?

test.html

<html>
    <body>
        <span> hello Joe</span>
        <span> hello Bob</span>
        <span> hello Gundam</span>
        <span> hello Corn</span>
    </body>
</html>

PHP file

$doc = new DOMDocument();
$doc->loadHTMLFile("test.html");

$xpath = new DOMXPath($doc);

$retrieve_data = $xpath->evaluate("//span");

echo $retrieve_data->item(1);
var_dump($retrieve_data->item(1));
var_dump($retrieve_data);

I am trying to use xPath to find the spans and then echo it, but it seems I cannot echo it. I tried dumping it to see if is evaluating properly, and I am not sure what does this output mean:

object(DOMElement)#4 (0) { } 
object(DOMNodeList)#7 (0) { }

What does the #4 and #7 mean and what does the parenthesis mean; What is does the syntax mean?

Update: This is the error I get when I try to echo $retrieve_data; and $retrieve_data->item(1);

Catchable fatal error: Object of class DOMNodeList could not be converted to string
5
задан Dimitre Novatchev 30 August 2010 в 00:02
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