Fwrite,Fopen,Fread...in admincp

[kiril_cvetkov]

Can we use Fopen,Fwrite,Fread php functions in admincp programming
here is my code

PHP Code:

if($_REQUEST['do'] == 'addplaylist')
{    
                            print_form_header('admin_podcast_box', 'do_addplaylist');

    print_table_header('Add podcast playlist song', 3);
    print_input_row('Podcast Name', 'podcastname', '', 0, '50');
    print_input_row('Podcast(url)','podcasturl','',0,50);

    print_submit_row($vbphrase['add']);
}
//Do Add Category
if($_REQUEST['do'] == 'do_addplaylist')


{
    $file = "music.xml";
$fh = fopen($file, 'a');
$string = "New text\n";
fwrite($fh, $string);
fclose($fh);
    $vbulletin->input->clean_array_gpc('p', array(
    'podcastname' => TYPE_STR,
    'podcasturl' => TYPE_STR,
));
    
  

    $db->query_write("
        INSERT INTO " . TABLE_PREFIX . "podcastinfo
        (
      name
        ) VALUES (
    '" . $db->escape_string($vbulletin->GPC['podcastname']) . "'
)");


define('CP_REDIRECT', "admin_podcast_box.php?do=deletepodcast");
    print_stop_message('droplink_category_added', $vbulletin->GPC['deftitle']);
   
} 


I don't get nothing in the text file, nothing is writed, i am using app serv on windows xp (maybe there are no permissions for writing)

Any help or sugestions?