[Solved] This update query won’t update record

by 


<?php    
   if (isset($_GET['edit']))

   {
?>
    <form action="index.php" method="post">

    <input type="text" name="id" value="<?=$id;?>">
    <input type="text" name="nieuweprijs" placeholder="vul nieuwe prijs in">
    <input type="submit" name="submitnieuweprijs" value="verzenden"><form>

<?php }
if (isset($_POST['submitnieuweprijs']))

{
    $nieuweprijs = Safesql($_POST['nieuweprijs']);
    $id = Safesql($_GET['id']);   
    if(!$mysqli->query("UPDATE prijzen SET prijs="".$nieuweprijs."" WHERE id='".$id."'"))
      { echo $mysqli->error;}
       Laden(0);
    }
} 
?>

$id is the value obtained from the query when editing data, you cannot update without ID definition or else

1

solved This update query won’t update record