PHP Redis invalid DB index - php

Question

I'm connecting to Redis Labs to use redis for our application.
Here is my configurations:
$conf=[
'scheme'=>'tcp',
'host'=>'ec2.cloud.redislabs.com',
'port'=>12860,
'database'=>'selector',
'password'=>'redispassword'
];
Then I do this to load the predis library:
require "lib/predis/autoload.php";
After which I do this:
$client = new Predis\Client($conf);
Then I try to run a command:
$client->hset('comments',"comment:1","{json_encoded_data}");
And this is the error I receive:
PHP Fatal error: Uncaught exception 'Predis\Connection\ConnectionException' with message '`SELECT` failed: ERR invalid DB index [tcp://cloud.redislabs.com:12860]' in /redis/lib/predis/src/Connection/AbstractConnection.php:155
I've looked online and people say I should set the database as 0 however If I do that how do I use my selected database?
Not sure what to do here.

Answer 1

The host parameter is for your instance endpoint:
And RedisLabs only allows one database per instance, so you'll have no problem using 0 in the database parameter:
That is exactly the reason why each of our Redis Cloud instances
allows using just one database (the default, 0-numbered database).
This ensures that any two databases in our service will never compete
on the resources of a single thread. In fact, trying to use any
database other than 0 with our service should produce an error.
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