CodeIgniter active record query with like() and or_like()

The problem is that it displays all the rows from db instead of displaying only those rows which contain search keywords.

public function search($data)
{

    $name = $data["name"];
    $surname = $data["surname"];

    $this->db->select('*');
    $this->db->from('workers');
    $this->db->like('name', '%' . $name . '%');
    $this->db->or_like('surname', '%' . $surname . '%');

    $query = $this->db->get();

You wrote CI like query wrong way.Look the documentation how to write it properly

Your query should be like this.No need to add %. CI add them if you do not pass 3rd parameter of like function.

$this->db->select('*');
$this->db->from('workers');
$this->db->like('name', $name);
$this->db->or_like('surname', $surname);

$query = $this->db->get();

Better do with some valid data like this.

$this->db->select('*');
$this->db->from('workers');
if($name)
{
   $this->db->or_like('name', $name);
}
if($surname)
{
    $this->db->or_like('surname', $surname);
}
$query = $this->db->get();