CFLib.org – Common Function Library Project

Description:
This UDF returns the index position of the last matching character in a string that you are searching for. If no matching string is found, a 0 is returned.

Return Values:
Returns a number.

Example:

<cfset file_name = "test.txt">

<cfset fileExtensionPosition = len(FORM.file_name) - lastIndexOf(FORM.file_name, ".")>
<!--- fileExtensionPosition  = 4 --->

<cfset fileExt = "#removeChars(FORM.file_name, 1, fileExtensionPosition)#">
<!--- fileExt = .txt --->

Parameters:

Full UDF Source:

<!---
 Returns the index position of the last matching character in a string.
 v2 rewrite by Raymond Camden
 
 @param targetString      String to check. (Required)
 @param lastChar      Character to look for. (Required)
 @return Returns a number. 
 @author Chris Douglas (chrisgdouglas@gmail.com) 
 @version 2, August 16, 2008 
--->
<cffunction name="lastIndexOf" returntype="numeric" output="no">
    <cfargument name="targetString" type="string" required="yes">
    <cfargument name="lastChar" type="string" required="yes">
  
    <cfif find(lastChar, arguments.targetString)>
        <cfreturn len(arguments.targetString) - find(lastChar,reverse(arguments.targetString))>  
    <cfelse>
        <cfreturn 0>
    </cfif>
    
</cffunction>