$my_array = array();
$dir = opendir ("/var/www/html/uploads");
        while (false !== ($file = readdir($dir))) {
                if (strpos($file, '.txt',1)||strpos($file, '.txt',1) ) {
                   $my_array[] = $file;
                   echo '<SELECT name=category>';
                   foreach($my_array as $key => $value)
                   {
                   echo '<OPTION value='.$value.'> '.$value.'';
 
                   }
                   echo '</select>';
                }
        }