<cffunction>

Defines a function call

This tag must have a body.

This tag is also supported within <cfscript>

<cffunction name=string returnType=string bufferOutput=boolean roles=string access=string output=boolean displayName=string hint=string abstract=boolean description=string returnFormat=string secureJson=boolean verifyClient=boolean localMode=string cachedWithin=object modifier=string consumes=string produces=string httpMethod=GET|PUT|POST|DELETE restPath=string ><!--- body ---></cffunction>
Attribute Description
name
string, required

A string; a component method that is used within the cfcomponent tag.
returnType
string, optional

String; a type name; data type of the function return value
bufferOutput
boolean, optional

This attribute is only used when output of the function is set to false. If this attribute is set to true (default) the output written to the body of the function is buffered and in case of an exception also outputted.

If set to false the content to body is ignored and not disabled when a failure in the body of the tag occur.
roles
string, optional

This attribute is used only for a component. If this attribute is omitted, all roles can invoke the method.
access
string, optional

This attribute is used only within a component. The client security context from which the method can be invoked

  • remote
  • public
  • package
  • private
output
boolean, optional

This attribute is used only for a component.

  • yes: the function is processed as if it were within a <cfoutput> tag
  • no: the function is processed as if it were within a <cfsilent> tag
displayName
string, optional

Display Name of the Function
hint
string, optional

Hint of the Function
abstract
boolean, optional

is the function abstract or not, abstract functions are only allowed inside interface or component tags
description
string, optional

Supplies a short text description of the function.
returnFormat
string, optional

The format in which to return values to a remote caller.

Supported values are

  • [wddx]
  • json
  • plain (text)
  • serialize (cfml, cfm)
  • xml
  • java
secureJson
boolean, optional

A Boolean value that specifies whether to add a security prefix in front of any value that the function returns in JSON-format in response to a remote call.
verifyClient
boolean, optional

A Boolean value that specifies whether to require remote function calls to include an encrypted security token. For use with AJAX applications only.
localMode
string, optional

Defines how the local scope of this function is invoked when a variable with no scope definition is used. Accepted values include:

  • classic (default): The local scope is only invoked when the key already exists in it (also aliased as false).
  • modern: The local scope is always invoked (also aliased as true).
cachedWithin
object, optional

possible values are:

  • String "request": If original content was created within the current request, cached content data is used.
  • a timespan (created with CreateTimeSpan()): If original content date falls within the time span, cached content data is used.

To use cached data, the function must be called with the exact same arguments (part of the cache key is a hash of the arguments)
modifier
string, optional

Use modifier to denote a function as abstract, static or final.

  • abstract: implementation must be defined in extended component.
  • final: implementation cannot be extended.
  • static: does not access instance variables in the component.
consumes
string, optional

A comma-separated list of acceptable MIME types that the function can accept or consume. If no value is specified, all MIME types are consumed by default. Use this attribute to control the types of content the function can handle. This attribute overrides the consumes attribute at the component level.
produces
string, optional

A comma-separated list of MIME types that the function can produce. The function will respond with the most acceptable media type as declared by the client. This attribute overrides the produces attribute at the component level.
httpMethod
string, optional

Specifies the HTTP method to use when calling the function as part of a RESTful service. Accepted values include:

  • GET: Requests information from the server.
  • POST: Sends information to the server for processing.
  • PUT: Requests the server to store the message body at the specified URL.
  • DELETE: Requests the server to delete the specified URL.
  • HEAD: Similar to GET but without a response body.
  • OPTIONS: Requests information about the communication options available for the server or the specified URL.

If not specified, the GET method is used by default.
restPath
string, optional

Defines a sub-resource path for the function when used as part of a RESTful web service. The path is case-sensitive and should avoid special characters. Regular expressions can be included in the path.

Examples

Simple Example with tag format

 	<cffunction access="private" name="add">
		<cfargument name="arg1" type="Numeric" required />
		<cfargument name="arg2" type="Numeric" required />
	 	<cfreturn arg1 + arg2 />
	</cffunction>
	<cfdump var="Define function Using tag.It returns :#add(4,2)#" />

Simple Example with script format

		writeDump("Define function using cfscript. It returns: "&add(2,3));
		public function add(required numeric arg1,required numeric arg2){
			return arg1+arg2;
		}

See also