Category Archives: Codeigniter


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Posted by on September 14, 2015 in Codeigniter



DataTables Server Side Processing with CodeIgniter



In this tutorial, we will see how to use popular dataTables with CodeIgniter framework. Note that, pagination is done in client side for this tutorial. Hence this example is not ideal for a big data set. Handling pagination in server side will be discussed in  a future tutorial.

Table format

                             <th>Need identified thru</th>
                                        <th>Total Estimate</th> 
                                        <th class="no-sort"></th>
                                        <th class="no-sort"></th>



Initializing and fetching data with ajax

    $(document).ready(function() {
            "ajax": "<?php echo base_url('test/get_json'); ?>",
            "pageLength": <?php echo $this->config->item('results_per_page'); ?>,
            "order": [[ 0, "desc" ]],
            "aoColumnDefs": [
                { "bVisible": false, "aTargets": [0] },
                    "bSortable": false,
                    "aTargets": ["no-sort"]  
            "dom": 'T<"clear">lfrtip',
            tableTools: {
                "sSwfPath": "<?php echo base_url("plugins/data_tables/extensions/TableTools/swf/copy_csv_xls_pdf.swf"); ?>"

Test Controller

class Test extends CI_Controller {
public function get_json() {
        $results = $this->test_model->load_grid();
        $data = array();
        foreach ($results  as $r) {
            array_push($data, array(
                anchor('test/view/' . $r['id'], 'View'),
                anchor('test/edit/' . $r['id'], 'Edit')

        echo json_encode(array('data' => $data));


class Test_model extends CI_Model {
public function load_grid() {
        $this->db->select("$this->tbl_urgent_needs.unid,$this->tbl_urgent_needs.year,$this->tbl_urgent_needs.needi,$this->tbl_urgent_needs.total_cost,$this-> AS mname,$this-> AS rname");
        $this->db->join("$this->tbl_roads", "$this->tbl_roads.rid = $this->tbl_urgent_needs.rd_id");
        $this->db->join("$this->tbl_maintenance_type", "$this-> = $this->tbl_urgent_needs.maint_type_id", "left");
        $this->db->order_by("$this->tbl_urgent_needs.unid", 'ASC');

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


Posted by on May 20, 2015 in Codeigniter, PHP



Passing Multiple Parameters to Form Validation Custom Callbacks in Codeigniter

Codeigniter Custom Callbacks

Codeigniter Custom Callbacks

CI natively only allows for  single parameter in custom callbacks. For an instance see the following code.

('hstate', 'State', 'required|callback_suburb_check[' . $suburb . ']');

If you need to pass multiple parameters, you have several options. Obviously you can change CI behaviour by subclassing the core library. But in this tutorial we follow the less pain approach. That ‘s to access required parameters via POST variables within your custom callback function. They are still available in this scope.

There is another way using your PHP string handling knowledge. Just formatting all the parameters as single string and passing to the callback function.

$parameters = 'first_arg' . '||' . 'second_arg' . '||' . 'third_arg';
('some_field', 'Some Field Name', 'callback__my_callback_function['.$parameters.']');  

Then in your callback,

function _my_callback_function($field_value, $second_parameter){
    list($first_param, $second_param, $third_param) = split('||', $second_parameter);
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Posted by on June 30, 2014 in Codeigniter


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How to remove index.php from CodeIgniter URL in Ubuntu




In application/config/config.php change:





Create or modify .htaccess in project root with following content.

# Customized error messages.
ErrorDocument 404 /index.php
# Set the default handler.
DirectoryIndex index.php
# Various rewrite rules.
<IfModule mod_rewrite.c>
  RewriteEngine on
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule ^(.*)$ index.php?/$1 [L,QSA]

Also allow overriding htaccess in your apache


and edit the file & change to



Restart Apache


sudo /etc/init.d/apache2 reload


sudo service apache2 reload


sudo /etc/init.d/httpd reload
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Posted by on May 3, 2014 in Codeigniter