use password_compact in codeigniter about password_compat HOT 2 CLOSED

$hash = password_hash($password, PASSWORD_DEFAULT, array('cost' => $this->cost));

// Update the user's password in the 'users' table
$this->db->set('password_hash', $hash);
$this->db->where('username', $username);
$this->db->update('users');

$this->db->reset_query();

// get the stored password hash
$query = $this->db->select('password_hash')->where('username', $username)->get('users');
$result = $query->row();

// check to see if the password given to us matches what we stored
if (password_verify($password, $result->password_hash)) {
    // Passwords match
    return TRUE;
} else {
    // Password mismatch
    return FALSE;
}