True unicode support

Problem/Motivation

Validation for passwords containing special unicode characters is not fully supported.

There is an issue with the way strings are iterated through, proper string size is calculated but the

<?php
$password[$i]
?>

approach goes through the string in 8bit increments so for example:

<?php
$password = "ăăPassword1" ;
$length = mb_strlen($password);

echo $length;
for($i = 0; $i<$length; $i++){
  echo $password[$i];
}
?>

Will output:

11ăăPasswor

Proposed resolution

We could use a function like:
http://www.php.net/manual/en/function.str-split.php#97690

<?php
function uni_strsplit($string, $split_length=1)
{
    preg_match_all('`.`u', $string, $arr);
    $arr = array_chunk($arr[0], $split_length);
    $arr = array_map('implode', $arr);
    return $arr;
}
?>

to get an array of actual unicode characters and then iterate with foreach

Remaining tasks

I will try to provide a patch, but please confirm that this is an issue.