How can I sign a message with a Litecoin address using PHP? How can I sign a message with a Litecoin address using PHP? r/litecoin

I am looking for something similar to https://github.com/BitcoinPHP/BitcoinECDSA.php/blob/master/src/BitcoinPHP/BitcoinECDSA/BitcoinECDSA.php, i.e. doing it independently on a PHP server without any need to make a JSON-RPC call.