unable to upload any other type of files.

[eluser]vitoco[/eluser]
Some hosting services doesn't allow uploading some file formats, in that case, the request will not even enter the controller, if that's not the case, i'll echo the raw data from the $_FILES array to check that the file MIME it's defined in config/mimes.php

Code:

function do_upload()
{
  echo '<pre>'.print_r( $_FILES , true ).'</pre>'; // print all uploaded files
  $config['upload_path'] = './uploads/';
  $config['allowed_types'] = 'gif|jpg|png|doc|docx|jpeg|pdf|txt|ppt|zip|php';
        $config['max_size']='1024*20';
  

  $this->load->library('upload', $config);

  $this->upload->do_upload();
     $data = $this->upload->data();
        $file_name=$data['file_name'];
  
}

Saludos