我怎样才能json_encode这个查询的结果？

Question

foreach($hello_world as $key=>$product_id) {
if(in_array($key,$exclude))continue;

$query = $this->db->query("SELECT * FROM product where modelNumber = '$product_id'");
if ($query->num_rows() > 0) {
foreach($query->result() as $row) {
    echo $row->name;
    }
}
}

有人可以就如何json编码此查询的结果给我建议吗？ 感谢

Answer 1

$data = array();
$query = $this->db->query("SELECT * FROM product where modelNumber = '$product_id'");
if ($query->num_rows() > 0) {
foreach($query->result() as $row) {
    $data[$row->id] = $row->name;
    }
}
$json = json_encode($data);