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XmlSearch

Last updated on May 30, 2024 | Also applies to ColdFusion

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Description

Uses an XPath language expression to search an XML document object.

Returns

The results of the XPath search. For details, see Usage.

Function syntax

XmlSearch(xml, xpath, params)

History

ColdFusion 10: Added support for XPath 2.0 syntax and for passing variables to XPath expressions.

ColdFusion 8: Added support for returning any valid XPath result, not just arrays of XML object nodes.

ColdFusion MX 7: Added support for attribute searches.

ColdFusion MX: Added this function.

Parameters

Parameter

Description

params

Optional. A struct that contains key-value pairs (variable name and value) document object as shown in the following example:

<cfscript>
params = structNew();
params["test"] = "food";
</cfscript>

<cfset result = xmlSearch(xmldoc,"/breakfast_menu/*[local-name() eq $test]", params)>

xml

XML document object

xpath

XPath expression

Usage

The XmlSearch function attempts to return the values returned by the search whenever possible. For example, if the XPath expression returns a Boolean, the CFML variable is assigned a true or false value .The following table lists XPath expression result data types and how they are represented in the CFML return value.

XPath return type	ColdFusion representation
Boolean	Boolean
Null	"" (empty string)
Number	Number
String	String
NodeSet	Array of XML nodes
Result Tree Fragment	Array of XML nodes

Results that are Unknown or have an unresolved variable in the expression throw an error.XPath is specified by the World Wide Web Consortium (W3C). For detailed information on XPath, including XPath expression syntax, see the W3C website at www.w3.org/TR/xpath.

Example

The following example extracts the elements named last, which contain employee last names, from an XML file, and displays the names .The employeesimple . xml file contains the following XML:

<?xml version="1.0" encoding="UTF-8"?> 
<employee> 
<!-- A list of employees --> 
<name EmpType="Regular"> 
<first>Almanzo</first> 
<last>Wilder</last> 
</name> 
<name EmpType="Contract"> 
<first>Laura</first> 
<last>Ingalls</last> 
</name> 
</employee>

The CFML file contains the following lines:

<cfscript> 
myxmldoc = XmlParse("C:\CFusionMX7\wwwroot\examples\employeesimple.xml"); 
selectedElements = XmlSearch(myxmldoc, "/employee/name/last"); 
for (i = 1; i LTE ArrayLen(selectedElements); i = i + 1) 
writeoutput(selectedElements[i].XmlText & "<br>"); 
</cfscript>

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XmlSearch

Description

Returns

Category

Function syntax

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History

Parameters

Usage

Example

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