wddx_serialize_value
(PHP 4, PHP 5)
wddx_serialize_value — Serialize a single value into a WDDX packet
Описание
Creates a WDDX packet from a single given value.
Список параметров
-
var -
The value to be serialized
-
comment -
An optional comment string that appears in the packet header.
Возвращаемые значения
Returns the WDDX packet, or FALSE on error.
Коментарии
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