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copied!<p>The source of your problem is in the Core Config.php file where the CI_Config class resides. The method site_url() is used by the form helper when you are trying to use form_open function. Solution would be to override this class with your own. If you are using CI < 2.0 then create your extended class in application/libraries/MY_Config.php, otherwise if CI >= 2.0 then your extended class goes to application/core/MY_Config.php. Then you need to redefine the method site_url().</p> <pre> class MY_Config extends CI_Config { function __construct() { parent::CI_Config(); } public function site_url($uri='') { //Copy the method from the parent class here: if ($uri == '') { if ($this->item('base_url') == '') { return $this->item('index_page'); } else { return $this->slash_item('base_url').$this->item('index_page'); } } if ($this->item('enable_query_strings') == FALSE) { //This is when query strings are disabled } else { if (is_array($uri)) { $i = 0; $str = ''; foreach ($uri as $key => $val) { $prefix = ($i == 0) ? '' : '&'; $str .= $prefix.$key.'='.$val; $i++; } $uri = $str; } if ($this->item('base_url') == '') { //You need to remove the "?" from here if your $config['base_url']=='' //return $this->item('index_page').'?'.$uri; return $this->item('index_page').$uri; } else { //Or remove it here if your $config['base_url'] != '' //return $this->slash_item('base_url').$this->item('index_page').'?'.$uri; return $this->slash_item('base_url').$this->item('index_page).$uri; } } } } </pre> <p>I hope this helps and I think you are using CI 2.0 that wasn't officially released, this was removed in the official CI 2.0 version</p>

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