These functions are intended for work with » WDDX.
In order to use WDDX, you will need to install the expat library (which comes with Apache 1.3.7 or higher).
After installing expat compile PHP with --enable-wddx.
Версия PHP для Windows имеет встроенную поддержку данного расширения. Это означает, что для использования данных функций не требуется загрузка никаких дополнительных расширений.
Данное расширение не определяет никакие директивы конфигурации в php.ini.
This extension defines a WDDX packet identifier returned by wddx_packet_start().
Данное расширение не определяет никакие константы.
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.
Example#1 Serializing a single value with WDDX
<?php
echo wddx_serialize_value("PHP to WDDX packet example", "PHP packet");
?>
This example will produce:
<wddxPacket version='1.0'><header comment='PHP packet'/><data>
<string>PHP to WDDX packet example</string></data></wddxPacket>
Example#2 Using incremental packets with WDDX
<?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;
?>
This example will produce:
<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>
Note: If you want to serialize non-ASCII characters you have to convert your data to UTF-8 first (see utf8_encode() and iconv()).