Description:
------------
The php levenshtein function, documented here:

http://php.net/manual/en/function.levenshtein.php

does not perform as stated with unicode characters over 1 byte in length.  The 
code sample below will print out a character difference of 3, when it should be 
1.  The characters below are some random Japanese characters and use 3 bytes to 
store their values in unicode.  The same behavior can be seen comparing an ASCII 
single quote to a unicode right single quote, which also takes 3 bytes vs the 
single byte for the ASCII character.

Test script:
---------------
<?php
printf("%d\n", levenshtein("日", "語"));
?>




Expected result:
----------------
Expected Output: 1

Actual result:
--------------
Actual Output:   3