ZEND PHP 5 Certification STUDY GUIDE

XML and Web Services ” 203
Removing Data
There are three types of data you may want to remove from an XML document:
attributes, elements and CDATA. DOM provides a different method for
each of these tasks: DomNode::removeAttribute(), DomNode::removeChild() and
DomCharacterData::deleteData():
$xml = item(0)->parentNode->removeChild($result->item(0));
$result->item(1)->removeAttribute(’type’);
$result = $xpath->query(’text()’, $result->item(2));
$result->item(0)->deleteData(0, $result->item(0)->length);
echo $dom->saveXML();
In this example, we start by retrieving all of the text nodes from our document,
then we remove the first one by accessing its parent and passing the former to
DomNode::removeChild(). Next, we remove the type attribute from the second element
using DomNode->removeAttribute().
Finally, using the third element, we use Xpath again to query for the corresponding
text() node, passing in the third element as the context argument, and then delete
the CDATA using DomCharacterData::deleteData(), passing in an offset of 0 and a
count that is the same as the length of the CDATA node.
Licensed to 482634 - Amber Barrow (itsadmin@deakin.edu.au)