I am working on a basic blog application with Codeigniter 3.1.8. and Bootstrap 4. The application has a search posts functionality.
The form in the header view:
Code:
<form method="get" action="<?php echo base_url('posts/search') ?>" id="search_form" class="w-100 py-1 px-2 px-md-3 px-lg-5" accept-charset="utf-8">
<div class="input-group <?php if(form_error('search')) echo 'has-error';?>">
<input class="form-control form-control-dark" type="text" name="search" placeholder="Search posts..." aria-label="Search">
<?php if(form_error('search')) echo form_error('search'); ?>
<div class="input-group-append">
<button class="btn btn-success" type="submit"><i class="fa fa-search"></i></button>
</div>
</div>
</form>
Since the posts are paginated, so should the search results. The index() and search() methods are both part of the same Posts controller, so I have tried to NOT repeat the pagination's code:
Code:
private function _initPagination($path, $totalRows, $query_string_segment = 'page') {
//load and configure pagination
$this->load->library('pagination');
$config['base_url'] = base_url($path);
$config['query_string_segment'] = $query_string_segment;
$config['total_rows'] = $totalRows;
$config['per_page'] = 12;
if (!isset($_GET[$config['query_string_segment']]) || $_GET[$config['query_string_segment']] < 1) {
$_GET[$config['query_string_segment']] = 1;
}
$this->pagination->initialize($config);
$limit = $config['per_page'];
$offset = ($this->input->get($config['query_string_segment']) - 1) * $limit;
return ['limit' => $limit, 'offset' => $offset];
}
public function index() {
//call initialization method
$config = $this->_initPagination("/posts", $this->Posts_model->get_num_rows());
$data = $this->Static_model->get_static_data();
$data['categories'] = $this->Categories_model->get_categories();
//use limit and offset returned by _initPaginator method
$data['posts'] = $this->Posts_model->get_posts($config['limit'], $config['offset']);
$this->load->view('partials/header', $data);
$this->load->view('posts');
$this->load->view('partials/footer');
}
public function search() {
// Force validation since the form's method is GET
$this->form_validation->set_data($this->input->get());
$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->get('search');
$posts_count = $this->Posts_model->search_count($expression);
$query_string_segment = 'search=' . $expression . '&page';
$config = $this->_initPagination("/posts/search", $posts_count, $query_string_segment);
$data = $this->Static_model->get_static_data();
$data['categories'] = $this->Categories_model->get_categories();
//use limit and offset returned by _initPaginator method
$data['posts'] = $this->Posts_model->search($expression, $config['limit'], $config['offset']);
$data['expression'] = $expression;
$data['posts_count'] = $posts_count;
$this->load->view('partials/header', $data);
$this->load->view('search');
$this->load->view('partials/footer');
}
}
The model:
Code:
public function search_count($expression) {
$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', $limit, $offset);
return $query->result();
}
The PROBLEM:
The first page of search results displays 12 items containing the search expression, as expected, but all the other pages, display all the posts again.
Since
Code:
$config['query_string_segment']
is used by the pagination, the line
Code:
$query_string_segment = 'search=' . $expression . '&page';
should help pass the search expression, via $_GET[] to the pages 1, 2 and so on. But the page items link does not keep "=" and "&":
Code:
<a href="http://localhost/ciblog/posts/search?search%3Dharum%26page=2" data-ci-pagination-page="2">2</a>
Why does that happen? Where is my mistake?
