Question

我不知道为什么在修改表单中可以在另一个文件中使用的查询，而不是更改另一个文件，而是使用这种方式通过另一个页面检索记录的值：

<?php echo "<a href='test.php?id_rich_dis={$row['ID_Richiesta']}' type='button'><i class='fas fa-info-circle fa-1x'></i></a>"; ?>

这是我的表格：

<?php session_start();
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
?>


<!-- RECOVER THE ID OF THE REQUEST AND SELECT ALL OF ITS VALUES FROM THE RISP_RICH.PHP PAGE -->
<?php
include 'connection/cnt.php';
$id_richiesta = $_GET['id_rich_dis'];
$query_string = "SELECT * FROM richieste WHERE ID_Richiesta = '$id_richiesta'";
$query = mysqli_query($connessione, $query_string);
?>


<!-- FORM AND CONTROL INSTRUCTIONS -->
<?php
if (isset($_POST['test'])) {
    $id = $connessione->real_escape_string($_POST['ID_Richiesta']);
    $id_professionista_da_modificare = $connessione->real_escape_string($_POST['id_professionista']);

    $connessione->query("UPDATE richieste SET
                                ID_Collaboratore='$id_professionista_da_modificare',
                                WHERE ID_Richiesta ='$id'");
}
?>

<form action="test.php" method="post">

<!-- PERFORM A WHILE CYCLE TO EXIT ALL VALUES OF THE QUESTION IN QUESTION -->
<?php while($row = mysqli_fetch_assoc($query)){ ?>
        <input value="<?php echo $row['ID_Richiesta']; ?>" name="ID_Richiesta">
        <input type="text" name="id_professionista" value="2"><br>
<?php } ?>



        <input id="test" value="MODIFICA" name="test"  type="submit">
    </form>

但更改未成功，但出现此错误

Notice: Undefined index: id_rich_dis

但是我不知道为什么

Answer 1

检查变量'$ id_richiesta'的内容是什么，因为其值为$ _GET ['id_rich_dis']。因此，要使其未定义就意味着$ _GET ['id_rich_dis']不返回值。从那里开始查看，并检查所有内容是否都用小写字母，因为某些问题是由区分大小写引起的。

PHP |更新查询给我未定义的索引：

1 个答案: