I am working on a basic blog application in Codeigniter 3.1.8. The posts are paginated. The application uses a pagination.php configuration file.
There is a search box for searching posts. I wish to paginate the search results and, since the methods index() and search() are in the same Posts controller, I am looking for a way avoid code redundancy by using the pagination inside for the search results too.
In the posts controller I have:
Code:
class Posts extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->model('Static_model');
$this->load->model('Posts_model');
$this->load->model('Categories_model');
$this->load->model('Comments_model');
}
public function index() {
//load and configure pagination
$this->load->library('pagination');
$config['base_url'] = base_url("/posts");
$config['query_string_segment'] = 'page';
$config['total_rows'] = $this->Posts_model->get_num_rows();
$config['per_page'] = 12;
if (!isset($_GET[$config['query_string_segment']]) || $_GET[$config['query_string_segment']] < 1) {
$_GET[$config['query_string_segment']] = 1;
}
$limit = $config['per_page'];
$offset = ($this->input->get($config['query_string_segment']) - 1) * $limit;
$this->pagination->initialize($config);
$data = $this->Static_model->get_static_data();
$data['categories'] = $this->Categories_model->get_categories();
$data['posts'] = $this->Posts_model->get_posts($limit, $offset);
$this->load->view('partials/header', $data);
$this->load->view('posts');
$this->load->view('partials/footer');
}
public function search() {
$this->form_validation->set_rules('search', 'Search term', 'required|trim|min_length[3]');
$this->form_validation->set_error_delimiters('<p class = "error search-error"> ', ' </p>
');
// If search fails
if ($this->form_validation->run() === FALSE) {
return $this->index();
} else {
$expression = $this->input->post('search');
$data = $this->Static_model->get_static_data();
$data['categories'] = $this->Categories_model->get_categories();
$data['posts'] = $this->Posts_model->search($expression, $limit, $offset);
$data['expression'] = $expression;
$this->load->view('partials/header', $data);
$this->load->view('search');
$this->load->view('partials/footer');
}
}
}
The Posts_model model has the code for both the posts list and the search results:
Code:
public function get_posts($limit, $offset) {
$this->db->order_by('id', 'DESC');
$query = $this->db->get('posts', $limit, $offset);
return $query->result();
}
public function search_count() {
$query = $this->db->like('title', $expression)
->or_like('description', $expression)
->or_like('content', $expression);
$query = $this->db->get('posts');
return $query->num_rows();
}
public function search($expression, $limit, $offset) {
$query = $this->db->like('title', $expression)
->or_like('description', $expression)
->or_like('content', $expression);
$this->db->order_by('posts.id', 'DESC');
$query = $this->db->get('posts');
return $query->result();
}
The code above is nonfunctional. The browser throws this error:
Code:
Message: Undefined variable: limit
Filename: controllers/Posts.php
I got stuck in my attempt to borrow the pagination from index() to search().
What is missing?