(PHP using ActiveX) Compress XML Tree

Demonstrates how to compress and restore the entire subtree rooted at an XML node.

The input XML, available at http://www.chilkatsoft.com/data/compress2.xml, is this:

<root>
    <lazydog>
        <fox>The quick brown fox jumps over the lazy dog</fox>
    </lazydog>
    <fox>The quick brown fox jumps over the lazy dog</fox>
    <child>
        <grandchild>The quick brown fox jumps over the lazy dog</grandchild>
    </child>
    <child>
        <grandchild>The quick brown fox jumps over the lazy dog</grandchild>
    </child>
</root>

Download Chilkat XML ActiveX

<?php

$xml = new COM("Chilkat.Xml");

//  The sample input XML is available at http://www.chilkatsoft.com/data/compress2.xml
$success = $xml->LoadXmlFile('compress2.xml');
if ($success != 1) {
    print $xml->lastErrorText() . "\n";
    exit;
}

//  Zip compress the root node's entire subtree:
$xml->ZipTree();

//  Examine the new XML document:
print $xml->getXml() . "\n";

//  This is the XML w/ the compressed subtree in Base64 encoded format:
//  
<root><![CDATA[4+WyKcrPL7Hj5VIAApucxKrKlPx0KBcslJZfYReSkapQWJqZnK2QVJRfnqcAFFPIKs0tKFbIL0st
UigBSoN0KgC12uiDNECN00c1jyKzkjMyc1KQHZZelJiXAhElyUwkfTBnovDoYZGNPjTUAQ==
]]></root>


//  Now uncompress and show that the original subtree was restored:
$xml->UnzipTree();
print $xml->getXml() . "\n";


?>