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WDDX Functions

Introduzione

These functions are intended for work with » WDDX.

Requisiti

In order to use WDDX, you will need to install the expat library (which comes with Apache 1.3.7 or higher).

Installazione

After installing expat compile PHP with --enable-wddx.

La versione per Windows di PHP ha già compilato il supporto per questo modulo. Non occorre caricare alcun modulo addizionale per potere utilizzare queste funzioni.

Configurazione di Runtime

Questa estensione non definisce alcuna direttiva di configurazione in php.ini

Tipi di risorse

This extension defines a WDDX packet identifier returned by wddx_packet_start().

Costanti predefinite

Questa estensione non definisce alcuna costante.

Esempi

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>

Nota: If you want to serialize non-ASCII characters you have to convert your data to UTF-8 first (see utf8_encode() and iconv()).

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