CFML Reference
ColdFusion Functions

IsWDDX

Description

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

Return value

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

Category

Decision functions, XML functions

Syntax

IsWDDX(value)

History

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

Parameters

Parameter	Description
value	A WDDX packet

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>

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