IsXML

Description

Determines whether a string is well-formed XML text.

Returns

True, if the function parameter is a string that contains well-formed XML text; False, otherwise.

Category

Decision functions, XML functions

Function syntax

IsXML(value)

See also

IsXmlAttribute, IsXmlDoc, IsXmlElem, IsXmlNode, IsXmlRoot, XmlParse, XmlValidate; Using XML and WDDX in ColdFusion MX Developer's Guide

History

ColdFusion MX 7: Added this function.

Parameters

Usage

This function determines whether text is well-formed XML, that is, it conforms to all XML syntax and structuring rules. The string does not have to be a complete XML document. The function does not validate against a Document Type Definition (DTD) or XML Schema.

Example

The following example creates two strings, and tests whether they are well-formed XML text:

<!--- A well formed XML string --->
<cfset xmlString1='<order id="4323251">
   <customer firstname="Philip" lastname="Cramer" accountNum="21"/>
   <items>
      <item id="43">
         <quantity>1</quantity>
         <unitprice>15.95</unitprice>
      </item>
   </items>
</order>'
>

<!--- An invalid XML string, missing the </item> close tag --->
<cfset xmlString2='<order id="4323251">
   <customer firstname="Philip" lastname="Cramer" accountNum="21"/>
   <items>
      <item id="43">
         <quantity>1</quantity>
         <unitprice>15.95</unitprice>
   </items>
</order>'
>

<!--- Test the strings to see if they are well formed XML --->
<cfoutput>
xmlString1 contains the following text:<br><br>
#HTMLCodeFormat(xmlstring1)#
Is it well formed XML text? #IsXML(xmlString1)#<br><br>
<hr>
xmlString2 contains the following text:<br><br>
#HTMLCodeFormat(xmlstring2)#
Is it well formed XML text? #IsXML(xmlString2)#
</cfoutput>

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