CallStackDump

Søg

Sidst opdateret den 11. jan. 2022 | Gælder også for ColdFusion

ColdFusion

Åbn app

Description

Similar to the function callStackGet except that it returns a string representation of the call stack.

History

ColdFusion (2018 release): Renamed the parameter destination to output.

ColdFusion 10: Added this function.

Syntax

CallStackDump(output)

Parameters

Parameter	Description
output	Optional parameter that takes one of the following values: console browser: This is the default destination. file: If you do not provide the complete path to the file, the file is written to the temp directory as determined by the function getTempDirectory.

Parameter

Description

output

Optional parameter that takes one of the following values:

console
browser: This is the default destination.
file: If you do not provide the complete path to the file, the file is written to the temp directory as determined by the function getTempDirectory.

Usage

Callstack is a snapshot of all function calls or invocations. For your ColdFusion application, callstack provides the template name, line number, and if applicable, the function name.The feature is helpful in scenarios where you want to track the recursive calls that you made.

Example

In this example, the factorial of a number is computed. The example is similar to the example for CallStackGet except that the function used here is callStackDump.callfact.cfm

<cftry> 
<cfinclude template="fact.cfm"> 
<cfcatch type="any"> 
<cfoutput> 
#cfcatch.message# 
<br>#cfcatch.detail# 
<br> 
</cfoutput> 
</cfcatch> 
</cftry>

fact.cfm

<cffunction name="factorial" hint="returns the factorial of a number" output="true"> 
<cfargument name="n" required="yes" type="numeric" hint="The number for which the factorial is returned"/> 
<cfif n eq 1> 
<Cfset callStackDump()> 
<cfreturn 1> 
<cfelse> 
<Cfset callStackDump()> 
<cfreturn n * factorial(n - 1)> 
</cfif> 
</cffunction> 
<cfoutput> Factorial of 5 - #factorial(5)#</cfoutput>