Question

I’m trying to push new data into an existing array $query:

$query = $this->db->get('questions');
foreach ($query->result_array() as $row) {

    $get_answers = $this->db->get_where('answers', array('question_id' => $row['question_id']), 4);
}
//push all the get_answers data into $query array as a subarray
return $query;

Answer 1

I don’t think your $query variable there is actually an array, but rather a result set. You ought to put that into an array as well. Maybe something like this:

$query = $this->db->get('questions');
$result_array = array();
$i = 0;
foreach($query->result_array() as $row){
    $result_array[$i] = $row;
    $result_array[$i]['answers'] = $this->db->get_where('answers', array('question_id'=>$row['question_id']), 4);
    $i++;
}

var_dump($result_array);