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(PHP ActiveX) Removing / Deleting Child Nodes from XMLDemonstrates various methods for removing child nodes from an XML document. The input XML, available at http://www.chilkatsoft.com/data/fruit.xml, is this: <root> <fruit color="red">apple</fruit> <fruit color="green">pear</fruit> <veg color="orange">carrot</veg> <meat animal="cow">beef</meat> <xyz> <fruit color="blue">blueberry</fruit> <veg color="green">broccoli</veg> </xyz> <fruit color="purple">grape</fruit> <cheese color="yellow">cheddar</cheese> </root>
<?php // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml') $xml = new COM("Chilkat.Xml"); // The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml $success = $xml->LoadXmlFile('fruit.xml'); if ($success != 1) { print $xml->LastErrorText . "\n"; exit; } // The RemoveChild method removes (discards) all direct // children having the specified tag: $xml->RemoveChild('fruit'); // Show the resulting XML: print 'Result with all direct children having a tag equal to \'fruit\' removed:' . "\n"; print $xml->getXml() . "\n"; // The XML with the "fruit" direct children removed is shown below: // Notice that the "fruit" node beneath "xyz" was not removed. // This correct because it was not a direct child of the calling node. // <root> // <veg color="orange">carrot</veg> // <meat animal="cow">beef</meat> // <xyz> // <fruit color="blue">blueberry</fruit> // <veg color="green">broccoli</veg> // </xyz> // <cheese color="yellow">cheddar</cheese> // </root> // -------------------------------------------------------------------------- // Restore the original XML: $success = $xml->LoadXmlFile('fruit.xml'); // The RemoveChildWithContent method removes the child // having the exact content specified, regardless of the tag. // For example: $xml->RemoveChildWithContent('pear'); // Show the resulting XML: print 'Result with the node containing \'pear\' removed:' . "\n"; print $xml->getXml() . "\n"; // -------------------------------------------------------------------------- // Restore the original XML: $success = $xml->LoadXmlFile('fruit.xml'); // The RemoveChildByIndex method removes the Nth direct // child. Indexing begins at 0. The "xyz" child is at index 4: $xml->RemoveChildByIndex(4); // Show the resulting XML: // Notice that the entire "xyz" subtree is removed. print 'Result with the node at index 4 removed:' . "\n"; print $xml->getXml() . "\n"; // -------------------------------------------------------------------------- // Restore the original XML: $success = $xml->LoadXmlFile('fruit.xml'); // Navigate to the node with tag "xyz" // xyz is a Chilkat.Xml $xyz = $xml->FindChild('xyz'); // Remove the "xyz" subtree making it it's own XML document // with the "xyz" node at the root: $xyz->RemoveFromTree(); // Show both XML documents: print $xyz->getXml() . "\n"; print $xml->getXml() . "\n"; // Also, the TreeId property is an integer value assigned // to nodes in an XML document. All nodes belonging to // the same XML document will have the same TreeId. // Notice that the "xyz" node now has a different TreeId: print 'xyz TreeId = ' . $xyz->TreeId . "\n"; print 'xml TreeId = ' . $xml->TreeId . "\n"; ?> |
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