- base_convert: documentation ( source)
- strtr: documentation ( source)
<?php
function obfuscatePersonID($personID){
$code = strtr( base_convert($personID, 10, 36), "abcdefghijklmnopqrstuvwxyz", "ghijklmnopqrstuvwxyzabcdef" );
return $code ? $code : false;
}
obfuscatePersonID(199105260617);