<?php
// Our assoc array
$talk = array (
            'id' => 4,
            'title' => 'Dynamic Images in PHP - How and When to Use Them',
            'date' => '2002-04-29',
            'speaker' => 'Alison Gianotto',
            'url' => 'http://www.sdphp.net/talks/ag_image'
        );

// we can serialize the value and 
// create the packet in one step

$ser1 = wddx_serialize_vars('talk');

echo format_packet($ser1, 'In one step');

// or we could serialize it in several steps

$packet = wddx_packet_start("One of Alison's talks at SDPHP");
wddx_add_vars($packet, 'talk');
$ser2 = wddx_packet_end($packet);

echo format_packet($ser2, 'Making the packet by hand');

// now let's deserialize the packet

$vars = wddx_deserialize($ser2);
echo "<pre>\n<small>\n";
print_r($vars);
echo "</small>\n</pre>\n";

function format_packet($pckt, $title='wddx packet') {
    $re = '/^[^<]/';
    $pckt = str_replace('>', ">\n", $pckt);
    $t = explode("\n", $pckt);
    $s = "[ $title ]<br>\n<pre>\n";
    foreach ($t as $line) {
        if (trim($line) == '') {
            continue;
        } elseif (preg_match($re, $line)) {
            $tmp = explode("\n",str_replace('<', "\n<", $line));
            $s .= ' <span style="color: blue;">'.
                    $tmp[0]."</span>\n".
                    htmlspecialchars($tmp[1])."\n";
        } else {
            $s .= htmlspecialchars($line)."\n";
        }
    }
    $s .= "</pre>\n<hr>\n";
    return $s;
}

?>