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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 1.2 $ -->
<chapter xml:id="wddx.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
&reftitle.examples;
<section xml:id="wddx.examples-serialize">
<para>
All the functions that serialize variables use the first
element of an array to determine whether the array is to be
serialized into an array or structure. If the first element has
string key, then it is serialized into a structure, otherwise,
into an array.
</para>
<example>
<title>Serializing a single value with WDDX</title>
<programlisting role="php">
<![CDATA[
<?php
echo wddx_serialize_value("PHP to WDDX packet example", "PHP packet");
?>
]]>
</programlisting>
<para>
This example will produce:
</para>
<screen>
<![CDATA[
<wddxPacket version='1.0'><header comment='PHP packet'/><data>
<string>PHP to WDDX packet example</string></data></wddxPacket>
]]>
</screen>
</example>
<example>
<title>Using incremental packets with WDDX</title>
<programlisting role="php">
<![CDATA[
<?php
$pi = 3.1415926;
$packet_id = wddx_packet_start("PHP");
wddx_add_vars($packet_id, "pi");
/* Suppose $cities came from database */
$cities = array("Austin", "Novato", "Seattle");
wddx_add_vars($packet_id, "cities");
$packet = wddx_packet_end($packet_id);
echo $packet;
?>
]]>
</programlisting>
<para>
This example will produce:
</para>
<screen>
<![CDATA[
<wddxPacket version='1.0'><header comment='PHP'/><data><struct>
<var name='pi'><number>3.1415926</number></var><var name='cities'>
<array length='3'><string>Austin</string><string>Novato</string>
<string>Seattle</string></array></var></struct></data></wddxPacket>
]]>
</screen>
</example>
<note>
<para>
If you want to serialize non-ASCII characters you have to convert
your data to UTF-8 first (see <function>utf8_encode</function> and
<function>iconv</function>).
</para>
</note>
</section>
</chapter>
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