src/AESGCM.php
private static function encryptWithPHP71($K, $key_length, $IV, $P = null, $A = null, $tag_length = 128)
    {
        $mode = 'aes-'.($key_length).'-gcm';
        $T = null;
        $C = openssl_encrypt($P, $mode, $K, OPENSSL_RAW_DATA, $IV, $T, $A, $tag_length / 8);
        Assertion::true(false !== $C, 'Unable to encrypt the data.');

        return [$C, $T];
    }
private static function encryptWithPHP71($K, $key_length, $IV, $P = null, $A = null, $tag_length = 128)
    {
        $mode = 'aes-'.($key_length).'-gcm';
        $T = null;
        $C = openssl_encrypt($P, $mode, $K, OPENSSL_RAW_DATA, $IV, $T, $A, $tag_length / 8);
        Assertion::true(false !== $C, 'Unable to encrypt the data.');

        return [$C, $T];
    }
@param string      $K          Key encryption key
@param string      $key_length Key length
@param string      $IV         Initialization vector
@param null|string $P          Data to encrypt (null for authentication)
@param null|string $A          Additional Authentication Data
@param int         $tag_length Tag length

@return array