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    wddx_serialize_value

    (PHP 4, PHP 5, PHP 7)

    wddx_serialize_value — Serialize a single value into a WDDX packet

    Avviso

    This function was REMOVED in PHP 7.4.0.

    Descrizione

    wddx_serialize_value(mixed $var, string $comment = ?): string

    Creates a WDDX packet from a single given value.

    Elenco dei parametri

    var

    The value to be serialized

    comment

    An optional comment string that appears in the packet header.

    Valori restituiti

    Returns the WDDX packet, or false on error.

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    User Contributed Notes 1 note

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    -4
    chris at digitalbase dot com
    22 years ago
    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
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