CFLib.org – Common Function Library Project

Description:
Converts the letters in a phone number to their numeric keypad equivalent (eg: a=>2, k=>5, p=>7, etc). Coded for phones using ISO/IEC 9995-8 (http://en.wikipedia.org/wiki/ISO/IEC_9995#ISO.2FIEC_9995-8), but easily changed.

Return Values:
A string with letters converted back to digits

Example:

<cfscript>
testNums= ["1-800-TRY-FOGO","555-212-cfml"];

for(x=1; x <= ArrayLen(testNums); x++) {
  result= convertPhoneLetters(testNums[x]);
  writeOutput(result & "<br />");
}
</cfscript>

Parameters:

Full UDF Source:

/**
 * Converts the letters in a phone number to the corresponding digits on an American phone.
 * version 1.0 by Brian Swartzfager
 * 
 * @param oldNumber      A string representing the phone number to convert (Optional)
 * @return A string with letters converted back to digits 
 * @author Brian Swartzfager (bcswartz@gmail.com) 
 * @version 1.0, August 26, 2012 
 */
public string function convertPhoneLetters(required string oldNumber) {
  var newNumber= arguments.oldNumber;
  var regArray= [
    "[A-Ca-c]",
    "[D-Fd-f]",
    "[G-Ig-i]",
    "[J-Lj-l]",
    "[M-Om-o]",
    "[P-Sp-s]",
    "[T-Vt-v]",
    "[W-Zw-z]"
  ];
        
  var resultArray= [
    2,3,4,5,6,7,8,9
  ];
        
  for (var x=1; x <= arrayLen(regArray); x++) {
    newNumber= REReplace(newNumber,regArray[x],resultArray[x],"all");
  }
        
  return newNumber;
}