lithium\g11n\multibyte\adapter\Mbstring::substr PHP Method

Here used as a multibyte enabled equivalent of substr().

public substr ( string $string, integer $start, integer $length ) : string \| boolean
$string	string
$start	integer
$length	integer
return	string \| boolean

    public function substr($string, $start, $length)
    {
        return mb_substr($string, $start, $length, 'UTF-8');
    }

Mbstring