codeigniter pagination-result not display at the next page - php

Question

I have implemented the CI Pagination into the system correctly. i have set limit 25 result per page. but i like to let user to change the limit such as 50,75,100 if they wish. The system work perfectly in first page if the user choose to view 50 result, but when the user click on the next page link or do sort table column, it return to limit 25.
here is my code.
view:
<?php
if(isset($_POST['num']))
{
$selected_option = $_POST['num'] ;
}else{
$selected_option ='';
}
$options = array(25,50,75,100);
?>
<form id="myForm" method="post" action = "">
Show <select name="num" onchange="document.getElementById('myForm').submit()">
<?php
$selected_option = $_POST['num'];
foreach($options as $v){
if($v == $selected_option){
$selected = 'selected = "selected"';
}else{
$selected = '';
}
echo "<option value='$v' $selected>$v</option>";
}
?>
</select> entries
</form>
<table style="width:100%">
<thread>
<?php foreach ($fields as $field_name => $field_display): ?>
<th <?php if($sort_by == $field_name) echo "class=\"sort_$sort_order\"" ?>>
<?php echo anchor("rps/index/$field_name/".
(($sort_order == 'asc' && $sort_by == $field_name) ? 'desc' : 'asc'), $field_display); ?>
</th>
<?php endforeach; ?>
</thread>
<tbody>
<?php foreach ($record as $key): ?>
<tr>
<?php foreach ($fields as $field_name => $field_display): ?>
<td><?php echo $key->$field_name; ?></td>
<?php endforeach; ?>
</tr>
<?php endforeach; ?>
</tbody>
</table>
<?php if (strlen($pagination)): ?>
Pages: <?php echo $pagination; ?>
<?php endif; ?>
controller:
public function index($sort_by='player_item', $sort_order='asc',$offset=0)
{
if (isset($_POST['num']) && !empty($_POST['num']))
$limit = $this->input->post('num');
else
$limit= 25;
$data7['fields'] = array(
'id' => 'ID',
'time' => 'Time',
'player_item' => 'Player Choose',
'comp_item'=> 'Computer Choose',
'result'=> 'Result'
);
$this->load->model('rps_result');
$result = $this->rps_result->history($limit,$offset,$sort_by,$sort_order);
$data7['record'] = $result['rows'];
$data7['num_record'] = $result['number_rows'];
//pagination
$this->load->library('pagination');
$this->load->helper('url');
$config['base_url'] = "http://localhost/xampp/CodeIgniter/index.php/rps/index/$sort_by/$sort_order";
$config['total_rows'] = $data7['num_record'];
$config['per_page'] = $limit;
$config['uri_segment'] = 5;
$this->pagination->initialize($config);
$data7['pagination'] = $this->pagination->create_links();
$data7['sort_by'] = $sort_by;
$data7['sort_order'] = $sort_order;
$this->load->view('rps_result', $data7);
}
model:
function history($limit,$offset,$sort_by,$sort_order)
{
$sort_order = ($sort_order == 'desc') ? 'desc' : 'asc';
$sort_columns = array('id','player_item','comp_item','result','time');
$sort_by = (in_array($sort_by, $sort_columns)) ? $sort_by : 'time';
//result query
$query = $this->db->select('id,player_item,comp_item,result,time')
->from('rps')
->limit($limit,$offset)
->order_by($sort_by,$sort_order);
$ret['rows'] = $query->get()->result();
//count query
$query1 = $this->db->select('count(*) as count', FALSE)
->from('rps');
$tmp = $query1->get()->result();
$ret['number_rows'] = $tmp[0]->count;
return $ret;
}
Any help will be deeply appreciated.

Answer 1

You should pass 'num' from page to page. When you select the value, it gets the form submitted and the page is reloaded. But it doesn't use $_POST['num'] on the next pages, the value doesn't pass trough. The easyest way to fix this, would be to store the value in a cookie. In your controller instead of $limit = $this->input->post('num'); do
if($this->input->post('num')){
setcookie('pagination_limit',$this->input->post('num'));
$limit = $this->input->post('num');
}elseif($this->input->cookie('pagination_limit')){
$limit = $this->input->cookie('pagination_limit', true);
}else{$limit = 25;}
In your view, you should also repalace $_POST['num'] with $this->input->cookie('pagination_limit', true);