query string don't work

[eluser]Aspi[/eluser]
Hi Forum members!

I have a litle problem I enabled in config query_string

Code:

$config['allow_get_array']    = TRUE;
$config['enable_query_strings'] = TRUE;
$config['controller_trigger']    = 'c';
$config['function_trigger']    = 'm';
$config['directory_trigger']    = 'd'; // experimental not currently in use

and my code controllers=>grid_xml

Code:

....
public function grid_xml($which){
        //$posStart = //$this->input->get($posStart)
        $this->load->model('MGridXml');
        $posStart = 0;
        $count = 10;
        
        if($posStart == 0){
        $totalCount = $this->MGridXml->countAll($which);
        }
        
        
        $from = $posStart;
        $grid_xml = $this->MGridXml->getGridDatas($which,$posStart,$count);
        
        $fields_num = count($grid_xml['fields']);
        $response = '<?xml version="1.0" encoding="utf-8"?>';
        $response .= "<rows total_count='".$totalCount."' pos='".$posStart."'>";
        foreach($grid_xml['data'] as $xml)
        {
            $response .='<row id="'.$xml['iktatasID'].'">';
            for($i=0;$i<$fields_num;$i++)
            {
             $fieldname = $grid_xml['fields'][$i];
             //if($fieldtype == "string")
             $response .= '<cell>&lt;![CDATA['.$xml[''.$fieldname.''].']]></cell>';
             //else
             //$response .= '<cell>'.$xml[''.$fieldname.''].'</cell>';
            }
            $response .='</row>';
        }
        $response .='</rows>';
        $this->output->set_output($response);
        $this->output->set_content_type("content-type: text/xml");
        $this->output->set_header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
        $this->output->set_header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . 'GMT');
        $this->output->set_header('Cache-Control: no-cache, must-revalidate');
        $this->output->set_header('Pragma: no-cache');
    }

and finaly my url:http://localhost/infobase_web/index.php?c=gridxml&m=grid_xml&which=iktatas

error:
A PHP Error was encountered

Severity: Warning

Message: Missing argument 1 for GridXml::grid_xml()

Filename: controllers/gridxml.php

Line Number: 57

Thank you

[eluser]bubbafoley[/eluser]
I think you have to use the get array to pull params extra params.

Code:

public function grid_xml() {

    $which = $this->input->get('which');
     ...

[eluser]Aspi[/eluser]
ok.working

THX