input post empty

Hi guys,
i'm writing a backend in CI (frontend separated in html/js)
when i tried to send POST data to my controller $_POST is empty..
I've tried for few way but i always receive a empty array.
Maybe the problem could be about htaccess???

tried to call my API 

Code:

http://mysite.com/users/register_post_user

two vars
id=test
email=[email protected]
tried already to set url with or without  / at the end    

my controller - Users.php -

PHP Code:

public function register_post_user()
    {
        print_r($_POST);

                //few alternative i tried
        //echo $_POST['id']." ".$_POST['email'];  
        //$id = $this->input->post('id');
        //$email = $this->input->post('email');
        //echo $id." ".$email;
    } 


in that case the result is

Code:

Array ( )

i'm sending request by Postman and my frontend. the result doesn't change.
here my - .htacces - (modified only for removing index.php)

Code:

RewriteEngine on
RewriteCond $1 !^(index\.php|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]

which js frawework you are using for posting? As I remember I had similar using when I used Angularjs.

Try 

PHP Code:

$_POST = json_decode(file_get_contents("php://input"), true); 


Or if it's not json you're sending without the json_decode

which js frawework you are using for posting? As I remember I had similar using when I used Angularjs.

I tried by Jquery, pure Javascript and tool called Postman.

Try 

PHP Code:

$_POST = json_decode(file_get_contents("php://input"), true); 


Or if it's not json you're sending without the json_decode

I'm sending two easy vars like => page.php?VAR1=value&VAR2=value2
I'm not sending json data

You're showing how you check if the vars were received, but not how you actually make the request.

We need to see your JavaScript code on how you are sending the data etc;

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )

my js function

Code:

function sendLogin(id, email) {
   $.ajax({
       type: "POST",
       contentType: "application/json; charset=utf-8",
       url: "http://www.plickapp.com/API/index.php/users/register_user/",
       data: "{'idfb':'" + id+ "', 'emailfb':'" + email+ "' }",
       success: function (result) {
            console.log("Ok " + result);
       },
       error: function (result) {
           console.log(result);
       }
  });
}

the frontend is hosted in another space (app, localhost, another server)
so i set the header in my controllers for accepting external request with

PHP Code:

header('Access-Control-Allow-Origin: *');
header("Access-Control-Allow-Headers: ACCEPT, CONTENT-TYPE, X-CSRF-TOKEN");
header("Access-Control-Allow-Methods: GET, POST, PUT, OPTIONS, DELETE");
header("Access-Control-Allow-Headers: Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With"); 


could be the .htaccess ?

-------- UPDATE ----------- 
sending data by GET it works.
example
my request

Code:

http://mysite.com/users/register_post_user/?id=5890459084523908&email=testemail

the result is 

Code:

Array ( [id] => 5890459084523908 [email] => testemail )

tested by URL in browser directly and by Postman....

js:

Code:

function sendLogin(id, email) {
   $.ajax({
       type: 'post',
       url: "http://www.plickapp.com/API/index.php/users/register_user/",
       data: {
           'idfb': id,
           'emailfb': email
       },
       success: function (result) {
            console.log("Ok " + result);
       },
       error: function (result) {
           console.log(result);
       }
  });
}

PHP:

Code:

public function register_post_user()
{
    ob_start();

    print_r($this->input->post());

    //few alternative i tried
    //echo $_POST['id']." ".$_POST['email'];  
    //$id = $this->input->post('id');
    //$email = $this->input->post('email');
    //echo $id." ".$email;

    $output = ob_get_clean();
    $this->output->set_output($output);
}

js:

Code:

function sendLogin(id, email) {
  $.ajax({
      type: 'post',
      url: "http://www.plickapp.com/API/index.php/users/register_user/",
      data: {
          'idfb': id,
          'emailfb': email
      },
      success: function (result) {
           console.log("Ok " + result);
      },
      error: function (result) {
          console.log(result);
      }
 });
}

PHP:

Code:

public function register_post_user()
{
   ob_start();

   print_r($this->input->post());

   //few alternative i tried
   //echo $_POST['id']." ".$_POST['email'];  
   //$id = $this->input->post('id');
   //$email = $this->input->post('email');
   //echo $id." ".$email;

   $output = ob_get_clean();
   $this->output->set_output($output);
}

It works!!! thank you!