CXVIII. WDDX Functions

Uvod

These functions are intended for work with WDDX.

Zahteve

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

Namestitev

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

The windows version of PHP has built in support for this extension. You do not need to load any additional extension in order to use these functions.

Nastavitve

Ta razširitev ne določa nastavitvenih direktiv.

Tipi sredstev

Ta razširitev ne določa nobenega tipa sredstev.

Predefinirane konstante

Ta razširitev ne definira nobene konstante.

Primeri

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.

Primer 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>

Primer 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>

Opomba: If you want to serialize non-ASCII characters you have to set the appropriate locale before doing so (see setlocale()).

Kazalo
wddx_add_vars --  Add variables to a WDDX packet with the specified ID
wddx_deserialize -- Deserializes a WDDX packet
wddx_packet_end -- Ends a WDDX packet with the specified ID
wddx_packet_start --  Starts a new WDDX packet with structure inside it
wddx_serialize_value -- Serialize a single value into a WDDX packet
wddx_serialize_vars -- Serialize variables into a WDDX packet