How to Access Elements in a Custom Namespace Using SimpleXML?

Handling Custom Namespaces in SimpleXML

Question:

In an XML document with a custom namespace, SimpleXML parsing fails to expose elements from that namespace. How can this be resolved?

Answer:

To access custom namespace elements using SimpleXML, it's necessary to register and use the namespace prefix. This is typically achieved using the children() function with the namespace prefix as the first argument and true as the second argument to enable recursive matching:

<code class="php">$rss = simplexml_load_string(
    '<?xml version="1.0" encoding="utf-8"?>
    <rss version="2.0" xmlns:moshtix="http://www.moshtix.com.au">
        <channel>
            <link>qweqwe</link>
            <moshtix:genre>asdasd</moshtix:genre>
        </channel>
    </rss>'
);

foreach ($rss->channel as $channel)
{
    echo 'link: ', $channel->link, "\n";
    echo 'genre: ', $channel->children('moshtix', true)->genre, "\n";
}</code>

This will output:

link:  qweqwe
genre: asdasd

By registering the namespace prefix, it becomes possible to access custom namespace elements and retrieve their values using children().

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