one controller for three pages - codeigniter

Question

I have one controller ADD. I want this controller to manipulate three pages: add_customer page, add_project page and add_post_page.In this case add_project page works perfectly. But add_customer and add_post pages have errors:
Failed to load resource: the server responded with a status of 500 (Internal Server Error).
I think the problem is in my coditions here:
public function index(){
if($this->uri->segment(3)=='add_customer'){
$this->add_customer();
}
else if($this->uri->segment(3)=='add_post'){
$this->add_post();
}
else{
$this->add_project();
}
}
This is my full controller:
class ADD extends MX_Controller {
public $mname, $tag, $tpl;
function __construct()
{
$this->mname=strtolower(get_class());
$this->tag=strtoupper($this->mname);
}
public function index(){
if($this->uri->segment(3)=='add_customer'){
$this->add_customer();
}
else if($this->uri->segment(3)=='add_post'){
$this->add_post();
}
else{
$this->add_project();
}
}
public function add_project()
{
include APPPATH."language/".LANG.".php";
$this->load->model($this->mname.'/add_project_model');
$model='add_project_model';
$this->$model->index($this->mname);
$a['IsEnabled']=$LANGUAGE['IsEnabled'];
$a['Submit']=$LANGUAGE['Submit'];
$a['Cancel']=$LANGUAGE['Cancel'];
$a['Reset']=$LANGUAGE['Reset'];
$a['Name']=$LANGUAGE['Name'];
$a['SelectCustomer']=$LANGUAGE['SelectCustomer'];
$a['Project Name']=$LANGUAGE['ProjectName'];
$a['Manager']=$LANGUAGE['Manager'];
$a['Customer']=$LANGUAGE['Customer'];
$userGROUP = $this->session->userdata('_userGROUP');
if ($userGROUP=='Administrator')
$a['AddManager']='<button type="button" class="btn btn-warning" onclick="AddNewManager()">+</button>';
else
$a['AddManager']='';
$this->tp->assign($a);
$this->tp->parse('CONTENT', $this->mname.'/add_project.tpl');
}
public function add_customer()
{
include APPPATH."language/".LANG.".php";
$userGROUP = $this->session->userdata('_userGROUP');
if($userGROUP!=='Administrator')
{
show_404('page');
exit;
}
$this->load->model($this->mname.'/add_customer_model');
$model='add_customer_model';
$this->$model->index($this->mname);
$a['IsEnabled']=$LANGUAGE['IsEnabled'];
$a['Submit']=$LANGUAGE['Submit'];
$a['Cancel']=$LANGUAGE['Cancel'];
$a['Reset']=$LANGUAGE['Reset'];
$a['Name']=$LANGUAGE['Name'];
$a['Project Name']=$LANGUAGE['CustomerName'];
$a['Customer Name']=$LANGUAGE['Customer Name'];
$this->tp->assign($a);
$this->tp->parse('CONTENT', $this->mname.'/add_customer.tpl');
}
public function add_post()
{
include APPPATH."language/".LANG.".php";
$userGROUP = $this->session->userdata('_userGROUP');
if($userGROUP=='Engineer')
{
show_404('page');
exit;
}
$this->load->model($this->mname.'/add_post_model');
$model='add_post_model';
$this->$model->index($this->mname);
$a['IsEnabled']=$LANGUAGE['IsEnabled'];
$a['Submit']=$LANGUAGE['Submit'];
$a['Cancel']=$LANGUAGE['Cancel'];
$a['Reset']=$LANGUAGE['Reset'];
$a['Activity Name']=$LANGUAGE['Activity Name'];
$a['SalaryHour']=$LANGUAGE['SalaryHour'];
$this->tp->assign($a);
$this->tp->parse('CONTENT', $this->mname.'/add_post.tpl');
}
}
How can I resolve this problem?

Answer 1

Just Give it a Try, Hope it works :
public function index(){
if($this->uri->segment(3)=='add_customer'){
redirect(base_url().'/Add/add_customer');
//$this->add_customer();
}
else if($this->uri->segment(3)=='add_post'){
redirect(base_url().'/Add/add_post');
//$this->add_post();
}
else{
redirect(base_url().'/Add/add_project');
//$this->add_project();
}
}

Answer 2

Your index function is never reached
This would reach it : http://project.dev/add
By default the following urls hit the appropriate function.
http://project.dev/add/add_customer hit public function add_customer()
http://project.dev/add/add_post hit public function add_post()
If you are getting errors check out the various error in the specific function and make sure you have error reporting turned on