How to Fix: PHP Fatal error: Uncaught RedisException: ERR AUTH called without any password configured for the default user. Are you sure your configuration is correct?

When setting up PHP Redis in a way like Digital Ocean on a localhost, you might get this error:

Fatal error: Uncaught RedisException: ERR AUTH called without any password configured for the default user. Are you sure your configuration is correct?

We assume your PHP script starts like this:

<?php

$redisPassword = "";

$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$redis->auth($redisPassword);

Because this is a localhost, we do not need a password for Redis. That is why we also do not need to use the $redis->auth() part. We can leave this out.

Or if you are using environment variables, you can use:

<?php

$redisPassword = "";

$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

if (!empty($redisPassword)
{
    $redis->auth($redisPassword);
}

If you are on a production server, it is wise to use a password, of course and not leave the $redis->auth() part out.

Happy coding!