ZEND PHP 5 Certification STUDY GUIDE

204 ” XML and Web Services
Working With Namespaces
DOM is more than capable to handle namespaces on its own and, typically, you can,
for the most part, ignore them and pass attribute and element names with the appropriate
prefix directly to most DOM functions:
$dom = new DomDocument();
$node = $dom->createElement(’ns1:somenode’);
$node->setAttribute(’ns2:someattribute’, ’somevalue’);
$node2 = $dom->createElement(’ns3:anothernode’);
$node->appendChild($node2);
// Set xmlns:* attributes
$node->setAttribute(’xmlns:ns1’, ’http://example.org/ns1’);
$node->setAttribute(’xmlns:ns2’, ’http://example.org/ns2’);
$node->setAttribute(’xmlns:ns3’, ’http://example.org/ns3’);
$dom->appendChild($node);
echo $dom->saveXML();
We can try to simplify the use of namespaces somewhat by using the
DomDocument::createElementNS() and DomNode::setAttributeNS() methods:
$dom = new DomDocument();
$node = $dom->createElementNS(’http://example.org/ns1’, ’ns1:somenode’);
$node->setAttributeNS(’http://example.org/ns2’, ’ns2:someattribute’, ’somevalue’
);
$node2 = $dom->createElementNS(’http://example.org/ns3’, ’ns3:anothernode’);
$node3 = $dom->createElementNS(’http://example.org/ns1’, ’ns1:someothernode’);
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$node->appendChild($node2);
$node->appendChild($node3);
$dom->appendChild($node);
echo $dom->saveXML();