如何在PHP中解码random_bytes（）的返回值

Question

I'm using random_bytes() to create a nonce which will return something like

��;w ���%N�:0���c1x*#�M��

Then when I base64_decode() it'll return something like ��� which is confusing because it's just a shorter version of something encrypted.
How do I get the actual string?

Answer 1

You are using the wrong function :base64_decode is made to decode a base64 encoded string. Here your string is not base64 encoded so having a shorter string is totally normal.

To generate a random (readable) string you could either use bin2hex or base64_encode:

$data = random_bytes(32);
$b = base64_encode($data);
echo $b;
xROAVp/JUq4DuEGe87HYINXncOHArYzc9oeziO/TTNw=