PHP: wddx_serialize_value - Manual

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wddx_serialize_vars wddx_packet_start

Last updated: Fri, 26 Jan 2007

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# wddx_serialize_value

(PHP 3 >= 3.0.7, PHP 4, PHP 5)

wddx_serialize_value -- Serialize a single value into a WDDX packet

## Description

string wddx_serialize_value ( mixed var [, string comment] )

wddx_serialize_value() is used to create a WDDX packet from a single given value. It takes the value contained in `var`, and an optional `comment` string that appears in the packet header, and returns the WDDX packet.

add a note User Contributed Notes
wddx_serialize_value
chris at digitalbase dot com
04-Jan-2002 04:36
`When serializing JavaScript objects to interact with PHP objects, you should make the JavaScript object's first entry a php_class_name.
PHP:
class myclass {
var $name;
var $age;
var $ssn;
...
function myclass() {
$this->name = "";
$this->age = "";
$this->ssn = "";
...
}
}
JavaScript:
// serialization example code is from the
// WDDX SDK http://www.openwddx.org
function SerializeMsg(name, age, ssn, ...) {
var MyObj = new Object;
// the following line is necessary in order
// to deserialize back to a PHP object
MyObj.php_class_name = "myclass";
MyObj.name = name;
MyObj.age = age;
MyObj.ssn = ssn;
...
// Create a new serializer "object" to do our work for us
MySer = new WddxSerializer;
// Serialize the Message variable into a WDDX Packet
MyWDDXPacket = MySer.serialize(MyObj);
// Output WDDX Packet so we can see what it looks like
return MyWDDXPacket;
}
Now you can use this in a page which is its own form action:
<?php
// don't forget to include the class definition from above!
if (!isSet($wddx_packet))
$MyObj = new myclass();
else
$MyObj = wddx_deserialize($wddx_packet);
?>
<html>
<head>
<script language="JavaScript">
<!--
function Init() {
// sets the form's text-elements
tmp = document.MyForm;
tmp.name.value = "<? echo $MyObj->name ?>";
tmp.age.value = "<? echo $MyObj->age ?>";
tmp.ssn.value = "<? echo $MyObj->ssn ?>";
...
}
function SerializeMsg(name, age, ssn, ...) {
// see above!
}
function SubmitForm() {
// sumbits the form
tmp = document.MyForm;
tmp.wddx_packet.value =
SerializeMsg(tmp.name.value, tmp.age.value, tmp.ssn.value,...);
document.submit();
}
// -->
</script>
</head>
<body>
...
<form name="MyForm"
action="<? echo $PHP_SELF ?>" method="post">
<input name="wddx_packet" type="hidden">
<input name="name" type="text">
<input name="age" type="text">
<input name="ssn" type="text">
...
<input name="SubmitBtn" type="button" onclick="SumbitForm()">
</form>
</body>
</html>
---------------------------------
If you don't provide that first 'php_class_name' in the JavaScript function, then when PHP deserializes it will deserialize into an associative array and not an object instance.
Note that this provides a way to maintain state without
using sessions or cookies - just good old HTML!
Hope this helps!
--
Chris Hansen`
add a note
wddx_serialize_vars wddx_packet_start

Last updated: Fri, 26 Jan 2007
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