Echo part of a JSON string in PHP from a variable or object that returns a prepended response

Question

This is what I get when echo a variable called $SessionID:

string(76) "{"jsonrpc":"2.0","id":1,"result":"a0440004cf00a89c25377c9cdsf357f50644eec46fd96"}"

I wish to only echo the "result" part of this data, i.e, a0440004cf00a89c25377c9cdsf357f50644eec46fd96. How do I accomplish this?

I have already tried json_decode to no avail(it also echos the entire $SessionID as above without any change:

$decoded_data= json_decode($SessionID);
echo $decoded_data->result;

I have an inkling this might be because of the "string(76)" prepended to the response.

Answer 1

Will this work?

$decoded_data= json_decode($SessionID, true);
echo $decoded_data['result'];