lacking unicode support for file uploading class?

[eluser]Arjen van Bochoven[/eluser]
It probably is a php issue, but it would be nice if CI checked for unicode support or sanitizes the filename somewhat stricter.

When I upload a file with unicode chars in the filename, I get an error. Can anyone confirm this? I followed the guidelines in the User Guide which resulted in a working application.

I'm not to good in handling unicode, so I took the url_title function and extended the CI_Upload class with this:

Code:

<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');


class MY_Upload extends CI_Upload {

     /**
      * Extra filename cleaning for unicode chars etc.
      *
      * @return string
      * @author bochoven
      **/

    function clean_file_name($filename)
    {
        $replace = '_';
        $trans = array(
                        "\s+"                                => $replace,
                        "[^a-z0-9\.".$replace."]"                => '',
                        $replace."+"                        => $replace,
                        $replace."$"                        => '',
                        "^".$replace                        => ''
                       );

        $filename = strip_tags(strtolower($filename));

        foreach ($trans as $key => $val)
        {
            $filename = preg_replace("#".$key."#", $val, $filename);
        }

        return trim(stripslashes($filename));
        
    }
}

This strips the filename, and all is fine