uprava dat v db

UPDATE tblname SET text='nova hodnota' WHERE id=3

$result = mysql_query("SELECT text FROM tabluka_kde_mas_text WHERE id = " . addslashes($_GET['id']));
while($row = mysql_fetch_array($result))
{
    echo '<form method="post">
          <textarea name="text">' . $row['text'] . '</textarea>
          <input type="submit" name="sent" value="Edit">';
    if(isset($_POST['sent']))
    {
        $sql = "UPDATE tabluka_kde_mas_text SET text = " . addslashes($_POST['text']) . " WHERE id = " . addslashes($_GET['id']);
        $result = mysql_query($sql);
    }
}

while($row = mysql_fetch_array($result))

while($row=@mysql_fetch_array($result))

$result =@mysql_query("SELECT text FROM uvod WHERE id = " . addslashes($_GET['id']));

<?php
  session_start();
  mysql_connect(host, user, pass);
  mysql_select_db("uvod");
 
  if (!$_POST['vyber']) {
  echo("Vyber si ID v tabulke:
        <form method=post>
        <input type='text' name='idcko'>
        <input type='submit' name='vyber'>
        </form>");}
 
  if($_POST['vyber']) {
  $_SESSION['idcko'] = $_POST['idcko'];
  $result = mysql_query("select * from uvod where id=" . $_SESSION['idcko']);
  while($row = mysql_fetch_object($result)) {
    echo("<form action='update.php' method=post>
          <textarea name='text'>" . $row -> text . "</textarea>
          <input type='submit' name='sent'>
          </form>");
  }
  }
?>

<?php
  session_start();
  mysql_connect(host, user, pass);
  mysql_select_db("uvod");
 
  if(mysql_query("update uvod set text='" . $_POST['text']. "' where id=" . $_SESSION['idcko']))
  echo("Uspesny update"); else echo("Neuspesny");
?>

<?php
  mysql_connect(localhost, root, xxx);
  mysql_select_db("clanok");
 
  $result = mysql_query("select text from uvod where id='1'");
  while($row = mysql_fetch_object($result)) {
    echo("<form action='update.php' method=post>
          <textarea name='text' rows='20' cols='50'>" . $row -> text . "</textarea><br>
          <input type='submit' name='sent'>
          </form>");
  }
}
?>