PHP Extension

Compress XML Tree

See more XML Examples

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>

PHP Extension

<?php

include("chilkat.php");

$success = false;

$xml = new CkXml();

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

// Zip compress the root node's entire subtree:
$success = $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:
$success = $xml->UnzipTree();
print $xml->getXml() . "\n";

?>