Description

Determines whether a value is a well-formed WDDX packet.

Returns

True, if the value is a well-formed WDDX packet; False, otherwise.

Category

Decision functions, XML functions

Syntax

IsWDDX(value)

See also

"Using WDDX" in the ColdFusion Developer's Guide

History

ColdFusion MX: Changed behavior: if the value parameter is not a WDDX packet, ColdFusion returns False. (In earlier releases, ColdFusion threw an error.)

Parameters

Usage

This function processes a WDDX packet with a validating XML parser, which uses the WDDX Document Type Definition (DTD).

To prevent CFWDDX deserialization errors, you can use this function to validate WDDX packets from unknown sources.

Example

<cfset packet="
    <wddxPacket version='1.0'>
    <header></header>
    <data>
        <struct>
        <var name='ARRAY'>
            <array length='3'>
                <string>one</string>
            <string>two</string>
            </array>
        </var>
        <var name='NUMBER'>
            <string>5</string>
        </var>
        <var name='STRING'>
            <string>hello</string>
        </var>
        </struct>
    </data>
    </wddxPacket>"
    >
<hr>
<xmp>
<cfoutput>#packet#
</xmp>
IsWDDX() returns #IsWDDX(packet)#<br>
</cfoutput>