How to get field names of mysql table in codeigniter?

Some Times this may helpful

$fields = $this->db->field_data('table_name');

foreach ($fields as $field)
{
   echo $field->name;
   echo $field->type;
   echo $field->max_length;
   echo $field->primary_key;
}

What you did is to get the datas from the table.... here your table is user so

in your model function do this...

function get_field()
{
$result = $this->db->list_fields('user');
foreach($result as $field)
{
$data[] = $field;
return $data;
}
}

in your controller do this

function get_field()
{
$data['field'] = $this->model_name->get_field();
$this->load->view('view_name',$data);
}

in your view do this

foreach($field as $f)
{
echo $f."<br>"; //this will echo all your fields
}

hope this will help you

using database library write this code to list all fields:

$this->db->list_fields('table')

take a look here: https://codeigniter.com/userguide3/database/results.html#CI_DB_result::list_fields