:sig
String base64_decode(String raw)

:params
raw : Base64-encoded text
return value : the decoded bytes (empty on invalid input)

:content
Decodes Base64 text back to bytes. Pairs with `base64_encode()` for round-tripping binary data through text channels.

:example
print(base64_decode("aGVsbG8="), "\n");

:see
>uri
base64_encode