PHP Extension

Serialize / Deserialize Hashtable to/from XML

Demonstrates how to seralize / deserialize a Hashtable to/from XML.

Note: This example requires Chilkat v9.5.0.64 or later.

PHP Extension

<?php

include("chilkat.php");

// Note: This example requires Chilkat v9.5.0.64 or later.

// Add some entries to a hashtable.
$hashTab = new CkHashtable();

$hashTab->AddStr('aaa','111');
$hashTab->AddStr('bbb','222');
$hashTab->AddStr('ccc','333');

// Serialize to XML
$sb = new CkStringBuilder();
$hashTab->ToXmlSb($sb);
print $sb->getAsString() . "\n";
print '---' . "\n";

// The output is as follows.  Each hash table entry
// is contained in an "e" node.  The entry's key
// is in the "k" node, and the value in the "v" node.

// <?xml version="1.0" encoding="utf8-8"?>
// <hashtable>
// <e><k>aaa</k><v>111</v></e>
// <e><k>bbb</k><v>222</v></e>
// <e><k>ccc</k><v>333</v></e>
// </hashtable>
// 

// Now load (deserialize) into a new hash table.
$hashTab2 = new CkHashtable();
$hashTab2->AddFromXmlSb($sb);

// Get the hash table keys, and lookup each (to show 
// that the hash table was correctly deserialized).
// The GetKeys method can return the keys in any order.
$sTable = new CkStringTable();
$hashTab2->GetKeys($sTable);

$i = 0;
$numKeys = $sTable->get_Count();
while ($i < $numKeys) {
    $key = $sTable->stringAt($i);
    print $key . ': ' . $hashTab2->lookupStr($key) . "\n";
    $i = $i + 1;
}


?>