Redis writing and reading an array?

Question

PHP

Записать: $redis->hmset($key, $result);
Считать: $redis->get($key);

And if the write passes without errors, then when reading, I get a void print_r also gives nothing. What am I doing wrong?
Writing a normal string works like this:

Записать: $redis->set($key, $result);
Считать: $redis->get($key);