小编Q W*_*nly的帖子

我试图使用此代码从mysql数据库中删除用户

if (isset($_POST['user_delete'])) {
    $key = $_POST['keyToDelete'];
    $check = "DELETE FROM user WHERE id = ". $key or die(mysqli_error($connection));

    $result2 = $connection->query($query);
    if($result2->num_rows >0){
         $query_delete = "DELETE FROM user WHERE id =". $key or die(mysqli_error($connection));

    var_dump($query_delete);
} else {

}

但它不想删除我的数据库。但是SQL已经正确了，我也得到了ID，因为我试图将其var_dump。请帮助我的代码出了什么问题