Parse XML (SRU) with php

Question

I have tried to parse an XML response that does not work. In the API docs it says that it is a XML based protocol: SRU. Wont this XML parsing code work then? Or is it some error in the code?

code:

$xmldoc = new DOMDocument();
$xmldoc->load('http://api.site.com/sru/query=' . $_GET['q']);
print_r($xmldoc);

$xpathvar = new Domxpath($xmldoc);
$queryResult = $xpathvar->query('//datafield[@tag="020"]/subfield[$code="a"]');
foreach ($queryResult as $result) {
    echo $result->textContent;
    print_r($result);
}

xml structure:

<searchRetrieveResponse>
    <numberOfRecords>1</numberOfRecords>
    <datafield tag="020" ind1=" " ind2=" ">
        <subfield code="a">xyz</subfield>
    </datafield>

    ...

</searchRetrieveResponse>

How do you know it "does not work"? Can you provide the error? — eykanal, May 03 '11 at 20:47
No output. And print_r($xmldoc) though shows that the xnl is fetched. Error should be afterwards. — Joseph, May 03 '11 at 22:13

eykanal · Answer 1 · 2011-05-04T01:12:36.797

0

The dollar sign in $code (in the xpathvar->query) looks like it doesn't belong there. Try either removing or escaping the dollar sign, as appropriate in your case (removing looks appropriate, given the example xml).

edited May 04 '11 at 01:12

answered May 04 '11 at 00:36

eykanal

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I though this was only true for double quotes. Perhaps it is version-dependent? – jisaacstone May 04 '11 at 00:55
No, you're correct... this is incorrect as it is now. I'm editing it now. – eykanal May 04 '11 at 01:11
@eyekanal Sry my bad with the question posting. I edited the attribute for easier reading and put $ instead of @. The code has the correct syntax but is still not passing anything to $queryResults. The foreach loop does not go. – Joseph May 04 '11 at 06:59

Parse XML (SRU) with php

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