Zapísanie textu z textového poľa "Fatal error"

<?php
$subor = "../domov-sk.php";
$fp = fopen ($subor, "r");
$text = fread ($fp, filesize($subor));
fclose ($fp);
?>


 <form action="index.php?page=domov-sk" method="post">
<textarea id="textarea1" name="novyText" >
<?php echo $text ?>
</textarea>
<script language="javascript1.2">
  generate_wysiwyg('textarea1');
</script>

 <br />
<input type="submit" value="Uložiť" name="ok" />
</form>

 <br />
<br />
<a href="index.php?page=sk">naspäť</a>

 <?php
$novyText = $_POST['novyText'];
$str = <<<EFC
$novyText
EFC;
if ($ok){
    $fp = fopen ($subor, "w");
    fwrite ($fp, $str);
    $fclose ($fp);
}
?>