note 17955 added to function.wddx-serialize-value
| From: | chris at digitalbase dot com | Date: | Fri, 04 Jan 2002 21:36:48 +0000 |
| Subject: | note 17955 added to function.wddx-serialize-value | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-24406@lists.php.net to get a copy of this message | ||
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
--
http://www.php.net/manual/en/function.wddx-serialize-value.php
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