Question

你好我有我的代码我只想删除一个特定的行，但是当我运行我的程序时它会删除所有代码..？

 <html>
 <body>
 <?php
 $servername = "localhost"; 
 $username = "root";
 $password = "";
 $dbname = "csedb";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}

// sql to delete a record
$sql = "DELETE FROM addform WHERE id_stu=$id_stu";

if (mysqli_query($conn, $sql)) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . mysqli_error($conn);
}
if($sql)
{
header('location:student.php');
}
mysqli_close($conn);
?>
</body>
</html>

Answer 1

将值赋予where子句，如

$sql = "DELETE FROM addform WHERE id_stu=<id_or_value>";

希望有所帮助

Answer 2

您需要为id_stu提供一个值 DELETE FROM addform WHERE id_stu =您的号码

Answer 3

你必须给出一个值：

$sql = "DELETE FROM addform WHERE id_stu = 1";

Answer 4

您需要传递要删除的行的特定ID。

$sql = "DELETE FROM addform WHERE id_stu=id_to_delete";

另外，不要忘记了解如何防止sql注入。

删除我表格中的信息

4 个答案: