How to decrypt a string ( encrypted by a MetaTrader Terminal 4 fixed version of AES256 ) with PHP tools?

I have a string, say "My secret text". It has been encrypted using MQL4 CryptEncode() function ( where the used method was CRYPT_AES256 ). The key ( 32 bytes ) was, say, "

https://stackoverflow.com/questions/41086192/how-to-decrypt-a-string-encrypted-by-a-metatrader-terminal-4-fixed-version-of