if (isset($_POST['id'])) {
$id = $_POST['id'];
$name = $_POST['name'];
$num = $_POST['num'];
$price = $_POST['price'];
}
mysql_select_db('price');
$sql ="UPDATE webprice SET name='".$_POST['name']."', num=".$_POST['num'].",price=".$_POST['price']." WHERE id=".$_POST['id'];
$sel = mysql_query($sql);
$result = mysql_fetch_assoc($sel);
if($result){
header("Location: index.php");
}else{
echo "<p>更新失败。</p>";
}
/错误提示：Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in D:\phpStudy\WWW\m3\update.php on line 14 更新失败。