Question

您好我是PHP的新手，请帮助我了解我哪里出错了。下面是我所拥有的冗长代码的提取，我试图将SQL数据库值放到一个表中，并在前面添加复选框，允许用户选择和删除他们想要的记录。我的问题是，一旦通过复选框选择记录并点击删除，记录就不会被删除。

Validation bit是我在代码中删除复选框选中值的内容。 Populating checkboxes for each data row extracted from the database:会告诉您我是如何通过循环获取复选框的。

如果提供的信息不充分，请突出显示。谢谢。 验证位：

if(isset($_POST['deletez'])) 
  {
    foreach($_POST['deletez'] as $wec)
    {
    $db = mysqli_connect('localhost', 'root', '', 'regional_data');
    if(mysqli_connect_errno()) {die('The connection to the database could not be established.');}
    $rW = mysqli_query($db,"DELETE * FROM brands WHERE bname ='$wec'");
    } 
  }

填充从数据库中提取的每个数据行的复选框：

while ($reK = mysqli_fetch_array($runBrands))
{
$wec = $reK['bname'];
    echo "<tr class='brndTab'>";
echo "<tr>" 
."<td><input type='submit' name='deleteR' id='deleteR' value='Delete.'></td>". 
"</tr>";    
echo "</table>";
    echo "<td class='brndTab'>".$reK["bname"]."</td>";
    echo "<td class='brndTab'>".$reK["bvariant"]."</td>";
    echo "<td class='brndTab1'>".$reK["bsku"]."</td>";
    echo "<td class='brndTa'><input type='checkbox' name='deletez[]' value='$wec'></td>";
    echo "</tr>";
}

Answer 1

首先你不应该连接到循环内的数据库，移动行$ db = mysqli_connect（'localhost'，'root'，''，'regional_data'）;在foreach循环之外。否则，您为每个条目打开一个新连接。接下来，你在mysql语法中有一个错误，正确的语句是DELETE FROM brands WHERE bname ='$ wec'“。因为你要删除行而不是行的内容。要把它们放在一起，修改你的代码像这样：

$db = mysqli_connect('localhost', 'root', '', 'regional_data');
if(mysqli_connect_errno()) {die('The connection to the database could not be established.');}
foreach($_POST['deletez'] as $wec) {
    $rW = mysqli_query($db,"DELETE FROM brands WHERE bname ='$wec'");
}

通过PHP中填充的复选框删除“已检查”记录

1 个答案: