PHP

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.

Chilkat2 PHP

<?php

use Chilkat2\Hashtable;
use Chilkat2\StringBuilder;
use Chilkat2\StringTable;

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

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

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

// Serialize to XML
$sb = new StringBuilder();
$hashTab->ToXmlSb($sb);
echo $sb->GetAsString(), "\n";
echo "---\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 Hashtable();
$hashTab2->AddFromXmlSb($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 StringTable();
$hashTab2->GetKeys($sTable);

$i = 0;
$numKeys = $sTable->Count;
while ($i < $numKeys) {
    $key = $sTable->StringAt($i);
    echo $key, ': ', $hashTab2->LookupStr($key), "\n";
    $i = $i + 1;
}