CFLib.org – Common Function Library Project

Description:
Only allow the ASCII text characters (33 to 126) for a certain string, you can also give a list of character numbers for the characters you also want to deny in the string.

Return Values:
Returns a boolean.

Example:

<cfset str = "ci.rcle">
<cfset denylist = "44,46,59,64,124">
<cfoutput>
    #CheckAsc(str,denylist)#
</cfoutput>

Parameters:

Full UDF Source:

/**
 * Only allow ASCII text string.
 * 
 * @param str      String to check. (Required)
 * @param denylist      Additional list of codes to deny. (Optional)
 * @return Returns a boolean. 
 * @author Tjarko Rikkerink (tjarko@ditadres.com) 
 * @version 1, September 23, 2004 
 */
function checkAsc(str){ 
    var i = 1;
    var nr = "";
    var denylist = "";
        
    if(arrayLen(arguments) gte 2) denylist = arguments[2];
    while (i LTE len(str)) { 
        nr = asc(mid(str,i,1)); 
        if (nr LT 33 OR nr GT 126 OR listFind(denylist,nr)){
            return false;
        } 
        i = i + 1; 
    } 

    return true; 
}