Crypt/GPG/SignatureCreationInfo.php
public function getHashAlgorithmName()
    {
        if (!isset(self::$hashAlgorithmNames[$this->hashAlgorithm])) {
            return null;
        }
        return self::$hashAlgorithmNames[$this->hashAlgorithm];
    }
public function getHashAlgorithmName()
    {
        if (!isset(self::$hashAlgorithmNames[$this->hashAlgorithm])) {
            return null;
        }
        return self::$hashAlgorithmNames[$this->hashAlgorithm];
    }
Get a name for the used hashing algorithm.

@return string|null