Krok po kroku dlaczego nie działa? Opcje

[TroYan]

BŁąd:
Notice: Undefined index: tresc in c:\www\ft\podstrony\news.php on line 2

Notice: Undefined index: tresc in c:\www\ft\podstrony\news.php on line 3

skrypt wyglada tak:

[PHP] pobierz, plaintext 
<?php
 
$tresc=$_POST['tresc'];
$news=&#092;"<table border=1 cellpadding=0 cellspacing=0 style=border-collapse: collapse;border-style: dashed; border-width: 1 width=393 height=63 
 
id=AutoNumber1><tr><td width=393 height=11 bgcolor=#003300>&nbsp;</td></tr><tr><td width=393 height=48 
 
bgcolor=#669900>\".$tresc.\"</td></tr></table>\";
$file=fopen(&#092;"news.txt\",\"a+\");
fwrite($file,$news);
fclose($file);
 
?>
[PHP] pobierz, plaintext 

formularz tak:

[HTML] pobierz, plaintext 
<form action=news.php method=post>
  <p align="center">
  Dodawanie Newsów<p align="center">
  &nbsp;<p align="center">
  <textarea name=tresc value=tresc size="20" rows="8" cols="34"></textarea><p><p align=center><input type=submit name=wyslij value="Dodaj News"></input>
</body></form>
[HTML] pobierz, plaintext 

dlaczego nie działa ?