尝试获取非对象和未定义变量的属性时出错：Codeigniter

Question

I am facing the following error:

Trying to get property of non-object and Undefined variable php errors in my code

Controller:

function showDoctorInformation(){
    $this->load->model('PatientModel');
    $data['doctorinfo'] = $this->PatientModel->getDoctorInformation();
    $this->parser->parse('patient_msgview', $data);

}

Model:

function getDoctorId() {
        $this->db->from('person');
        $this->db->select('doctorId');
        $doctorId = $this->db->get()->result();
        return $doctorId;
    }

function getDoctorInformation() {


    $doctorId = $this->getDoctorId();

        $this->db->from('DoctorInfo');
        $this->db->where('doctorId', $doctorId);
        $this->db->select('name', 'surname', 'Bio', 'Address', 'img');
        $doctorinfo = $this->db->get()->result();
        return $doctorinfo;

}

View:

<?= $doctorinfo->name ?>

I have displayed information from the database before with this method and I can't see the error now.

Answer 1

result() return

This method returns the query result as an array of objects, or an empty array on failure

So you need to fetch single data form your database using ->row()

function getDoctorId() {
$this->db->select('doctorId');
$this->db->from('person');
$this->db->select('doctorId');
$query = $this->db->get();
if ($query->num_rows == 1) {
     $row=$query->row();// fetch single row
     return $row->doctorId;// get doctor id
} else {
    return FALSE;
}
}

And in viwe you have to get your data using foreach loop

For exm

foreach ($doctorinfo as $row)
{
        echo $row['title'];
        echo $row['name'];
        echo $row['body'];
}