CodeIgniter Resize and Crop Image

http://kennykee.com/138/codeigniter-resize-and-crop-image-to-fit-container-div-example/

DataTables Server Side Processing with CodeIgniter

[caption id="attachment_1101" align="aligncenter" width="273"] DataTables[/caption]

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

[sourcecode language="html"]
                             <th>Need identified thru</th>
                                        <th>Total Estimate</th>
                                        <th class="no-sort"></th>
                                        <th class="no-sort"></th>

                                    </tr>
                                </thead>

                            </table>

[/sourcecode]

Initializing and fetching data with ajax

[sourcecode language="javascript"]

<script>
    $(document).ready(function() {
        $('#dataTables').dataTable({
            "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"); ?>"
            }
        });
});
</script>
[/sourcecode]

Test Controller

[sourcecode language="php"]
class Test extends CI_Controller {
public function get_json() {
        $this->load->model('test_model');
        $results = $this->test_model->load_grid();
        $data = array();
        foreach ($results  as $r) {
            array_push($data, array(
                $r['rname'],
                $r['year'],
                $r['mname'],
                $r['need'],
                $r['total_cost'],
                anchor('test/view/' . $r['id'], 'View'),
                anchor('test/edit/' . $r['id'], 'Edit')
            ));
        }

        echo json_encode(array('data' => $data));
    }
}
[/sourcecode]

Model

[sourcecode language="php"]
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->tbl_maintenance_type.name AS mname,$this->tbl_roads.name AS rname");
        $this->db->from("$this->tbl_urgent_needs");
        $this->db->join("$this->tbl_roads", "$this->tbl_roads.rid = $this->tbl_urgent_needs.rd_id");
        $this->db->join("$this->tbl_maintenance_type", "$this->tbl_maintenance_type.id = $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();
    }
}

[/sourcecode]

Passing Multiple Parameters to Form Validation Custom Callbacks in Codeigniter

[caption id="attachment_979" align="aligncenter" width="225"] Codeigniter Custom Callbacks[/caption]

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

[sourcecode language="php"]
$this->form_validation->set_rules
('hstate', 'State', 'required|callback_suburb_check[' . $suburb . ']');
[/sourcecode]

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.

[sourcecode language="php"]
$parameters = 'first_arg' . '||' . 'second_arg' . '||' . 'third_arg';
$this->form_validation->set_rules
('some_field', 'Some Field Name', 'callback__my_callback_function['.$parameters.']'); 

[/sourcecode]

Then in your callback,

[sourcecode language="php"]
function _my_callback_function($field_value, $second_parameter){
    list($first_param, $second_param, $third_param) = split('||', $second_parameter);
    ...
}
[/sourcecode]

How to remove index.php from CodeIgniter URL in Ubuntu

[caption id="attachment_979" align="aligncenter" width="225"] CodeIgniter[/caption]

 

In application/config/config.php change:

$config['index_page']='index.php';

to:

$config['index_page']='';

 

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]
</IfModule>

Also allow overriding htaccess in your apache

/etc/apache2/sites-available/default

and edit the file & change to

AllowOverrideAll

and

Restart Apache

 

sudo /etc/init.d/apache2 reload

or:

sudo service apache2 reload

or:

sudo /etc/init.d/httpd reload

HTML Email with Codeigniter

[sourcecode language="php"]
$this->email->to( 'abc@gmail.com' );
$this->email->subject( 'Test' );
$this->email->message( $this->load->view( 'email/message', $data, true ) );
$this->email->send();
[/sourcecode]