CodeIgniter How to make filter function

How to make filter function in PHP.

View

For view, first make the dropdown list and filter button.

<?php echo form_open(''); ?>

<table width="100%">

<tr>

<td align="right">

<?php echo form_dropdown('name', $array_list, $selected_array, 'class="form-control input-inline input-small"'); ?>

<input type="submit" value="<?php echo lang('lbl_filter'); ?>" class="btn btn-primary" />

</td>

</tr>

</table>

<?php echo form_close(); ?>

'name' = data name that will to represent the data and be used to call in controller.

$array_list = data that you want to display inside the dropdown.

$selected_array = array that you have select to filter.

Controller list

$data = array();

      $data['selected_array'] = '';

  

      if ($post = $this->input->post()) {

        $post = $post = $this->input->post();

        $data_name = $post['name']; //data name that hv been set in view

  

        if (!empty($name)) {

          $this->db->where("column in table = $data_name");

          $data['selected_array'] = $data_name;

        }

      }

This controller is used to set the filter function.