Question

我有以下代码，它在某种程度上起作用：

if(isset($_POST['remove'])) {
    $user = $_POST['user'];
    $passcode = $_POST['passcode'];

    $sql = "SELECT * 
            FROM admin 
            WHERE username = '" . $user . "' 
            and passcode ='".md5($passcode)."'";

    $result = mysqli_query($conn,$sql);
    $row = mysqli_fetch_array($result,MYSQLI_ASSOC);
    $count = mysqli_num_rows($result);
    if($count==0) {
        echo "Invalid Credentials";
    } else {

        include 'config.php';
        $cnt=array();
        $listCheck = "'" .implode("','", $_POST['checkbox']) . "'";
        $sql6 = "DELETE FROM `customer` WHERE `name` IN ($listCheck)";
        $delete = mysqli_query ($conn,$sql6);
    }

问题是，它只删除所选行中的一行。如何修改代码以删除所有选定的行？

<input type="submit" name="remove" class="btn2" value="Delete Selected">
<div>
<?php
$query1 = "SELECT `name` FROM `customer` ORDER BY `name` ASC ";
$result = mysqli_query($conn, $query1);

echo "<table>";
while($row = mysqli_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $row['name'] . "</td>";
echo "<td><input name='checkbox[]' type='checkbox' id='checkbox[]' value=" . $row['name'] . "></td>";
echo"</tr>";
}
echo "</table>";
echo "<br>";
?>
</div>

Answer 1

您可以简单地使用一个查询来删除所有记录，而不必担心for循环

 include 'config.php';
 $array = $_POST['checkbox'];
 $listCheck = "'" . implode("','", $array) . "'";
 echo $sql6 = "DELETE FROM `customer` WHERE `name` IN ($listCheck)";
 $delete = mysqli_query ($conn,$sql6);

此代码中也存在问题。将以下代码替换为您的代码

echo "<td><input name='checkbox[]' type='checkbox' id='checkbox[]' value='" . $row['name'] . "'></td>";

Answer 2

最好使用foreach( $_POST['checkbox'] as $k => $v)，它可能并不总是数字，即使这样，您也没有针对范围内每个可能的循环，但仅针对每个选定的复选框。

另请查看SQL查询的预准备语句，您不希望有可能的注入。

除了LIKE之外，最好用完全比较=替换。

Answer 3

请尝试以下代码：

 include 'config.php';
 $array = $_POST['checkbox'];
 $listCheck = "";
 foreach($array as $arr) {
     $listCheck .= "'" . urldecode($arr) . "',";
 }
 $listCheck = substr(trim($listCheck), 0, -1);
 echo $sql6 = "DELETE FROM `customer` WHERE `name` IN ($listCheck)";
 $delete = mysqli_query ($conn,$sql6);

Answer 4

这引起了我的注意

echo "<td><input name='checkbox[]' type='checkbox' id='checkbox[]' value" . $row['name'] . "></td>";

应该是

echo '<td><input name="checkbox[]" type="checkbox" id="checkbox[]" value="'.$row['name'].'" ></td>';

复选框的值缺少=

PHP - 通过Checkbox删除多行

4 个答案: