text base64Decode(text, flags)
Decode a Base64 text to characters in the UTF-8 charset or an hexadecimal representation of bytes.
Flags:
| Flag | Description | 
|---|---|
"h" | Decode to hexadecimal (text) representation, see hexEncode function. | 
"u" | Expect the “URL and filename safe” variant of Base64 where - and _ are used in place of + and /. |