随机字节创建未定义的字符

Question

I'm using Random Bytes to create a hash in PHP:

<?php 
class Hash
{
    public static function make($string, $salt = '')
    {
        return hash('sha256', $string . $salt);
    }
    public static function salt($length)
    {
        return random_bytes($length);
    }
    public static function unique()
    {
        return self::make(uniqid());
    }
}
?>

But I get this as result:

|i����� ͦ��S��7΋�j�)8ce��|i����� ͦ��S��7΋�j�)8ce��

So how what is this and how can I fix this problem?

Answer 1

Printing bytes is kind of hard to do.

As teresko suggested, wrap it in a base64_encode(), or use bin2hex(). The latter prints hexadecimal, so only uses 16 characters but that can be enough.

See here for both in action.