Codeigniter

<?php
class Testimonials extends CI_Controller
{

public $data = array();
/*============*/
// constructor
/*============*/
function __construct()
{
    parent::__construct();
    $this->load->library('pagination');

    $this->load->model('admin/admin_model');
    $this->load->model('admin/testimonials_model');
    $this->load->model('admin/testimonials_config_model');


    if(!$this->admin_model->validate_session())
        {
            die('you do not have permission');
        }
    else {

        //load required models

        //initialize variables
        $this->data['change_settings'] = FALSE;
        $this->data['atleast_one_required_field'] = TRUE;
        $this->data['testimonials_p_p_error'] = FALSE;
    }



}

/*=============*/
// index
/*=============*/
public function index()
{

    $this->load->view('admin/testimonials_view',$this->data);
}

/*================*/
// change_settings
/*================*/
public function change_settings()
{

    $testimonial_required_fields_setting = 0;
    $testimonial_required_fields_setting = $this->input->post('tc_require_phone') === 'true' ? $testimonial_required_fields_setting+1 : $testimonial_required_fields_setting;
    $testimonial_required_fields_setting = $this->input->post('tc_require_email') === 'true' ? $testimonial_required_fields_setting+1 : $testimonial_required_fields_setting;
    $testimonial_required_fields_setting = $this->input->post('tc_require_website') === 'true' ? $testimonial_required_fields_setting+1 : $testimonial_required_fields_setting;

    if($testimonial_required_fields_setting > 0)
        {
            $this->testimonials_config_model->update_required_fields();
            $this->data['atleast_one_required_field'] = TRUE;
            $this->data['change_settings'] = TRUE; }
        else {
                $this->data['atleast_one_required_field'] = FALSE;
                $this->data['change_settings'] = FALSE; }

//check testimonials per page setting
if( ($this->input->post('tc_testimonials_per_page') > 15) || ($this->input->post('tc_testimonials_per_page') <= 4))
{
    $this->data['testimonials_p_p_error'] = TRUE;
}else{
    $this->testimonials_config_model->set_config_value_plain('displayed_per_page',$this->input->post('tc_testimonials_per_page'));
}
    $this->index();
}

/*==========*/
// approve
/*==========*/
public function approve($option = null, $id = null) {

$this->data['approved']= false;
$this->data['deleted']=false;

if(strcasecmp($option, 'yes')==0)
    {
        $approve = array('testimonial_approved'=>1);
        $this->db->where('id',$id);
        $this->db->update('nv_cms_testimonials',$approve);
        $this->data['approved']=true;
    }
elseif(strcasecmp($option, 'no') == 0)
    {
        $this->db->delete('nv_cms_testimonials',array('id'=>$id));
        $this->data['deleted']=true;

    }
$this->data['new_testimonials'] = $this->testimonials_model->get_new_testimonials();
$this->load->view('admin/testimonials_approve_view.php',$this->data);
}

/*=========*/
// manage
/*=========*/
public function manage($action = null, $id = null) {


    $this->load->model('admin/testimonials_model');


$this->data['deleted'] = false;

if(strcasecmp($action, 'delete') == 0 )
{
    $this->db->delete('nv_cms_testimonials',array('id'=>$id));
    $this->data['deleted']=true;

    $this->data['testimonials'] = $this->testimonials_model->get_all_testimonials_with_pagination('5',$this->uri->segment(4));

    //pagination
    $config['base_url'] = base_url().'admin/testimonials/manage';
    $config['total_rows'] = $this->testimonials_model->get_all_testimonials();
    $config['per_page'] = 5;
    $config['uri_segment'] = 4;
    $this->pagination->initialize($config);

    $this->data['pagination_links'] = $this->pagination->create_links();
    $this->load->view('admin/testimonials_manage_view',$this->data);

}
elseif(strcasecmp($action, 'edit')==0)
{


    $this->data['testimonial'] = $this->testimonials_model->get_testimonial_by_id($id);
    $this->load->view('admin/testimonials_edit_view',$this->data);
}
elseif(strcasecmp($action, 'update')==0)
{
    $this->testimonials_model->update_testimonial($id);

}else{


         $CI =& get_instance();


    $this->data['testimonials'] = $CI->testimonials_model->get_all_testimonials_with_pagination('5',$this->uri->segment(4));

    //pagination
    $config['base_url'] = base_url().'admin/testimonials/manage';
    $config['total_rows'] = $this->testimonials_model->get_all_testimonials();
    $config['per_page'] = 5;
    $config['uri_segment'] = 4;
    $this->pagination->initialize($config);

    $this->data['pagination_links'] = $this->pagination->create_links();
    $this->load->view('admin/testimonials_manage_view',$this->data);
    }

}//manage

}