IsWDDX

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 Developing ColdFusion Applications

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>