CFLib.org – Common Function Library Project

Description:
Escapes a credit card number, showing only the last 4 digits. The other digits are replaced with the * character.

Return Values:
Returns a string.

Example:

<cfset creditcard="4343010125259797">
<cfoutput>#ccEscape(creditcard)#</cfoutput>

Parameters:

Full UDF Source:

/**
 * Escapes a credit card number, showing only the last 4 digits. The other digits are replaced with the * character.
 * return just stars if str too short, found by Tony Monast
 * 
 * @param ccnum      Credit card number you want to escape. (Required)
 * @return Returns a string. 
 * @author Joshua Miller (josh@joshuasmiller.com) 
 * @version 2, April 26, 2009 
 */
function ccEscape(ccnum){
    if(len(ccnum) lte 4) return "****";
    return "#RepeatString("*",val(Len(ccnum)-4))##Right(ccnum,4)#";
}