I'm searching for a PHP script creating a key or serial nr (containg only basic chars : 0-9 / A-Z) based on a String. I have to be able to revert the key / serial number to get back the String.
String : 20090401MYLICENSEJOHNDOE
Key or Serial nr : AHSH-D33D-DFKH-JF236-768D
Thanks in advance.