setting a default document

<?php
include("FCKeditor/fckeditor.php") ;

// *****************************
$sValue = stripslashes( $_POST['FCKeditor1'] ) ;
$action = $_REQUEST['sent'];

$filename = "promotions-en.txt"; //Edit this to point to ur textfile
$handle = fopen($filename, "rb");
fclose($handle);

if ($action=="sent"){
   $fh = fopen($filename, 'w') or die("Can't Access the file at this moment.");

   $stringData = $sValue;
   fwrite($fh, $stringData);
   fclose($fh);
   
   $saved = "<p>Your file has been saved</p>";
   }

?>
  <?php echo $saved ?>
    <form action="<?php $_SERVER['HTTP_REFERER']; ?>" method="post">
      <?php
         $content = file_get_contents("promotions-en.txt");
         $oFCKeditor = new FCKeditor('FCKeditor1') ;
         $oFCKeditor->BasePath = 'FCKeditor/';
         $oFCKeditor->Value = $content;
         $oFCKeditor->Width    = '100%';
         $oFCKeditor->Height   = '490';
         $oFCKeditor->Create() ;
      ?>
      <br>
     <input type="hidden" name="sent" id="sent" value="sent" />
      <p style="text-align:center;"><input type="submit" value="Save Page"></p>
    </form>