Question

我正在尝试从表单中的复选框中删除电子邮件条目，但它无法从'todelete[]'数组中获取任何值

这是代码：

<?php
     $dbc= mysqli_connect('localhost','root','','customer_base')or die('Error connecting to MySQL server.');
    $query = "select * from email_list";
    $result= mysqli_query($dbc, $query)or die('Error querying database.');

        while($row= mysqli_fetch_array($result)){
       echo '<input type="checkbox" value="' .$row['id']. '"name="todelete[]" />';
       echo $row['first_name'].' '.$row['last_name'].' '.$row['email'].' '.'<br />';
    }

        if((isset($_POST['submit']))&&(isset($_POST['todelete']))){
        $output_form= false;
        foreach($_POST['todelete'] as $delete_id){
           $query = "delete from email_list where id = $delete_id";
           mysqli_query($dbc,$query)or die('Error querying database.');
        }
        echo '<p>Customer entry removed</p>'.'<br />';
    }elseif((isset($_POST['submit']))&&(empty($_POST['todelete']))){
           echo "<p>you haven't selected any customer entry to delete!</p>";
           $output_form= true;
       }else {$output_form= true; }
    mysqli_close($dbc);
    if($output_form){
    ?>
    <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
        <input type="submit" name="submit" value="remove" />
    </form>
<?php
   }

?>

现在，如果没有选中复选框，它会给出消息，选中复选框，但即使选中了复选框，它仍会返回消息以选中复选框。因此，它永远不会进入删除查询的循环，而$_POST['todelete']始终为空，但它不应该。你试图检查$_POST数组是否为空，它没有任何结论，我试图通过很多答案，但似乎我的查询尚未解决......需要帮助!!

我在使用代码做错了什么？

Answer 1

您的复选框似乎在表单标记之外。只需用下面的代码替换您的代码：

//check for $_POST values
if((isset($_POST['submit']))&&(isset($_POST['todelete']))){
    $output_form= false;

    foreach($_POST['todelete'] as $delete_id){
       $query = "delete from email_list where id = $delete_id";
       mysqli_query($dbc,$query)or die('Error querying database.');
    }

    echo '<p>Customer entry removed</p>'.'<br />';
}elseif((isset($_POST['submit']))&&(empty($_POST['todelete']))){
    echo "<p>you haven't selected any customer entry to delete!</p>";
    $output_form= true;
}else {
    $output_form= true; 
}
//check if to show form
if($output_form){ ?>
    <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
        <?php 
            $dbc= mysqli_connect('localhost','root','','customer_base')or die('Error connecting to MySQL server.');
            $query = "select * from email_list";
            $result= mysqli_query($dbc, $query)or die('Error querying database.');

            while($row= mysqli_fetch_array($result)){
               echo '<input type="checkbox" value="' .$row['id']. '"name="todelete[]" />';
               echo $row['first_name'].' '.$row['last_name'].' '.$row['email'].' '.'<br />';
            }

            mysqli_close($dbc);
         ?>
        <input type="submit" name="submit" value="remove" />
    </form>
<?php } ?>

因为我可以看到你正在使用mysqli，我建议你继续使用PDO。

复选框中的post数组始终为空

1 个答案: