将查询更改为Codeigniter中的活动记录

Question

I want to change this code into active record query and I am have difficulties doing so.

 public function get_user($username, $password) {
    $p = md5($password);
    $q = "SELECT u.userid, u.userfullname, u.useraddress
    FROM user u 
    WHERE u.username = ? AND u.userpassword = ?";

    $r = $this->db->query($q, [$username, $p]);
    $this->db->close();
    return $r->result_object();
}

Answer 1

You don't need the table alias "u" when you're just dealing with a single table. If you're referring to what CodeIgniter now calls Query Builder, then this is your answer:

$r = $this->db->select('userid, userfullname, useraddress')
    ->where('username', $username)
    ->where('userpassword', $p)
    ->get('user');

if( $r->num_rows() > 0 )
    return $r->result();

return FALSE;

Answer 2

https://www.codeigniter.com/userguide3/database/query_builder.html

return $this->db->select('userid, userfullname, useraddress')
->where('username', $username)
->where('userpassword', $p)
->get('user')->row();

// if no entry null will be returned
//row returns user as an object row_array() returns user as an array

also instead of md5 look at their encryption library https://www.codeigniter.com/user_guide/libraries/encryption.html