XML Node accessing attribute with namespace

Question

This is my xml data.

<?xml version="1.0" encoding="UTF-8"?>
    <ns1:catalog
xmlns:ns1="http://www.omnichannelintegrationlayer.com/xml/catalog/2016-01-01" catalog-id="at-master-catalog">
<ns1:product product-id="4132002004">
    <ns1:min-order-quantity>1</ns1:min-order-quantity>
    <ns1:step-quantity>1</ns1:step-quantity>
    <ns1:short-description
        xmlns:ns2="xml" ns2:lang="de-AT">Jogginghose Cacy jr
    </ns1:short-description>
    <ns1:short-description
        xmlns:ns2="xml" ns2:lang="de-CH">Jogginghose Cacy jr
    </ns1:short-description>
</ns1:product>

I'm trying to filter the xml the short-description base on ns2:lang attribute.

This is what I've done so far:

foreach ($xml->xpath("//ns1:product[@product-id='".$productid."']/ns1:short-description/") as $short_description) {
 $namespaces = $short_description->getNameSpaces(true);
    $ns1        = $short_description->children($namespaces['ns1']);
    $ns2        = $short_description->children($namespaces['ns2']);

    var_dump($ns2);
    echo $ns2["lang"];
}

The output of var_dump looks okay:

object(SimpleXMLElement)#27 (1) { ["@attributes"]=> array(1) { ["lang"]=> string(5) "de-AT" } }

But I can't access the array because when I echo $ns2["lang"], I'm getting NULL.

I already tried different solution like declaring namespace first but no luck.

Thanks in advance.

When I try attributes() I'm getting, Warning: var_dump(): Node no longer exists — rapidoodle
– rapidoodle, Commented May 21, 2018 at 10:23
Your XML doesn't have any tags named short-description - what are you expecting your xpath expression to match? — iainn
– iainn, Commented May 21, 2018 at 10:28

The fourth bird · Accepted Answer · 2018-05-21 14:42:31Z

1

The values you are looking for are in the attributes and the attributes use a namespace which you can pass as a parameter to the attributes method.

The attribute itself is of type SimpleXMLElement and has a method __toString to get the text content that is directly in this element.

You could for example use echo $short_description->attributes($namespaces['ns2'])->lang; or cast it to a (string)

You might update your code to:

$namespaces = $xml->getNamespaces(true);
foreach ($xml->xpath("//ns1:product[@product-id='".$productid."']/ns1:short-description") as $short_description) {
    $langAsString = (string)$short_description->attributes($namespaces['ns2'])->lang;
    echo $langAsString . "<br>";
}

That would give you:

de-AT
de-CH

Demo

edited May 21, 2018 at 14:42

answered May 21, 2018 at 14:36

The fourth bird

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1 Comment

rapidoodle Over a year ago

You didn't know how much help you did dude.. Thank you so much.

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