Using Predis, how to SET (i.e. store) a multidimensional associative array?

Question

I am following this guide to get started with Predis in PHP. In this guide, they have given the set() function to store key value pairs:

Answer 1

Set method expect value to be string. Use json_encode() to save data.

$redis->set('allRowsDataArray', json_encode($allRowsDataArray));

And use json_decode() to retrieve from Redis.