请看看为什么这段代码不起作用，我没有删除行。与服务器的连接正常。我可以添加新行，但当我对选定的行按DELETE键时，会注意到发生了什么。我认为"for"有问题。。
提前谢谢！
<?php
$host="localhost"; // Host name
$username=""; // Mysql username
$password=""; // Mysql password
$db_name=""; // Database name
$tbl_name="test_mysql"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql="SELECT * FROM $tbl_name";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<table width="400" align="center" 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="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Imię</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Nazwisko</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Wiek</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Płeć</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<? echo $rows['id']; ?>"></td>
<td bgcolor="#FFFFFF"><? echo $rows['id']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['name_client']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['lastname_client']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['old_client']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['sex_client']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?php
// Check if delete button active, start this
if($delete){
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";
$result = mysql_query($sql);
}
// if successful redirect to delete_multiple.php
if($result){
echo "<meta http-equiv='"refresh'" content='"0;URL=login_success.php'">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>
要使事情正常工作，只需将下面的代码替换为第59-69行中的代码即可。
if(isset($_POST) && isset($_POST['checkbox']))
{
$toDelete = $_POST['checkbox'];
for($i=0; $i<count($toDelete); $i++)
{
$del_id = $toDelete[$i];
$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";
$result = mysql_query($sql);
}
// if successful redirect to delete_multiple.php
if($result)
echo "<meta http-equiv='"refresh'" content='"0;URL=login_success.php'">";
}
此外，你最好重新考虑你的代码：
- 我认为"删除"查询中的CCD_ 1是多余的
- CCD_ 2被弃用
- 不鼓励短开口标签（
<?） - 您可以删除一个SQL查询中的所有选定项，而不是重复执行：
$idsToDelete = implode(',', $_POST['checkbox']); $sql = "DELETE FROM $tbl_name WHERE id IN ($idsToDelete);";