使用 PHP 通過選擇復(fù)選框刪除多行：常見錯(cuò)誤故障排除
使用 PHP 從 MySQL 數(shù)據(jù)庫表中刪除多行時(shí)，使用復(fù)選框選擇鏈接需要仔細(xì)編碼確保成功執(zhí)行。此代碼片段提供了常見問題的解決方案：
<code class="php"><html>
<head>
<title>Links Page</title>
</head>
<body>
<h2>Choose and delete selected links.</h2>
<?php
$dbc = mysqli_connect('localhost','root','admin','sample') or die('Error connecting to MySQL server');
$query = "select * from links ORDER BY link_id";
$result = mysqli_query($dbc,$query) or die('Error querying database');
$count=mysqli_num_rows($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td>
<form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="3" bgcolor="#FFFFFF">
<strong>Delete multiple links</strong>
</td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF">
<strong>Link ID</strong>
</td>
<td align="center" bgcolor="#FFFFFF">
<strong>Link Name</strong>
</td>
<td align="center" bgcolor="#FFFFFF">
<strong>Link URL</strong>
</td>
</tr>
<?php
while ($row=mysqli_fetch_array($result)) {
?>
<tr>
<td align="center" bgcolor="#FFFFFF">
<input name="checkbox[]" type="checkbox" value="<?php echo $row['link_id']; ?>">
</td>
<td bgcolor="#FFFFFF"> <?php echo $row['link_id']; ?> </td>
<td bgcolor="#FFFFFF"> <?php echo $row['link_name']; ?> </td>
<td bgcolor="#FFFFFF"> <?php echo $row['link_url']; ?> </td>
</tr>
<?php
}
?>
<tr>
<td colspan="4" align="center" bgcolor="#FFFFFF">
<input name="delete" type="submit" value="Delete">
</td>
</tr>
</table>
</form>
</td>
</tr>
</table>
<?php
// Check if delete button active, start this
if(isset($_POST['delete']))
{
$checkbox = $_POST['checkbox'];
for($i=0; $i<count($checkbox); $i++) {
$del_id = $checkbox[$i];
$sql = "DELETE FROM links WHERE link_id='$del_id'";
$result = mysqli_query($dbc, $sql); // Pass the database connection here
}
// if successful redirect to view_links.php
if($result){
echo '<meta http-equiv="refresh" content="0;URL=view_links.php">';
}
}
mysqli_close($dbc);
?>
</body>
</html></code>
修復(fù)：
- 將復(fù)選框名稱視為數(shù)組：name="checkbox []" 而不是 name="checkbox"。
- 將 $dbc 數(shù)據(jù)庫連接傳遞給每個(gè) mysqli_query 調(diào)用，如 $result = mysqli_query($dbc, $sql); 所示。
通過這些修改，代碼應(yīng)該根據(jù)所選的復(fù)選框正確刪除多行。
以上是如何在 PHP 中使用復(fù)選框刪除多行：解決常見錯(cuò)誤并確保成功執(zhí)行？的詳細(xì)內(nèi)容。更多信息請(qǐng)關(guān)注PHP中文網(wǎng)其他相關(guān)文章！