Sets a value in ColdFusion. Used to create a variable, if it does not exist, and assign it a value. Also used to call functions.

Variable Manipulation Tags

cfcookie cfparam cfregistry cfsavecontent cfschedule

<cfset  
    var variable_name = expression>

You use the cfset tag in several ways in your applications.

<!--- This example shows how to use cfset. ---> 
<cfquery name = "GetMessages" dataSource = "cfdocexamples"> 
    SELECT * 
    FROM Messages 
</cfquery> 
 
<h3>cfset Example</h3> 
cfset sets and reassigns values to local or global variables within a page. 
 
<cfset NumRecords = GetMessages.recordCount> 
For example, the variable NumRecords has been declared on this 
    page to hold the number of records returned from query 
    (<cfoutput>#NumRecords#</cfoutput>). 
 
In addition, cfset can be used to pass variables from other pages,  
        such as this example, which takes the url parameter Test from this 
        link: <a href = "cfset.cfm?test = <cfoutput> 
        #URLEncodedFormat("hey, you, get off of my cloud")#                    </cfoutput> 
        ">click here</A>) to display a message:  
 
<cfif IsDefined ("url.test") is "True"> 
    <cfoutput><b><I>#url.test#</i></b></cfoutput> 
<cfelse> 
    <h3>The variable url.test has not been passed from another page.</h3> 
</cfif> 
 
cfset can also be used to collect environmental variables, such as the  
    time, the IP address of the user, or another function or expression. 
 
<cfset the_date = #DateFormat(Now())# & " " & #TimeFormat(Now())#> 
<cfset user_ip = CGI.REMOTE_ADDR> 
<cfset complex_expr = (23 MOD 12) * 3> 
<cfset str_example = Reverse(Left(GetMessages.body, 35))> 
 
<cfoutput>  
    <ul>  
        <li>The date: #the_date#  
        <li>User IP Address: #user_ip#  
        <li>Complex Expression ((23 MOD 12) * 3): #complex_expr#  
        <li>String Manipulation (the first 35 characters of  
                the body of the first message in our query)  
                <br><b>Reversed</b>: #str_example#  
                <br><b>Normal</b>: #Reverse(str_example)#  
    </ul>  
</cfoutput>