Question

目标

删除选择了ID的所有数据

问题

数据不会被删除

错误

在开发者控制台中没有提示错误

工作说明

根据我的理解，代码的功能是检索用户ID（delete_userID），然后使用此行$delete_userID将其传递到mysqli_real_escape_string($conn,$_POST['delete_userID']);。但我无法理解为什么删除查询不起作用。我已经查看了几个有关此问题的在线问题，其中一些问题是因为缺少数据库代码mysql_select_db("data2017", $conn);，但这对我来说似乎不是问题。此外，我将其设置为单击输入按钮后，它将发送＆＃34;删除＆＃34;如果已单击按钮并且已收到呼叫，则调用if语句。除了检索用户ID之外，还要通过使用JavaScript函数传递要删除的用户ID，如下所示。

删除代码

<div class="modal-body">
  <p>Do you want to delete?</p>
</div>
<div class="form-group">
  <label for="delete_userID" class="control-label">User ID:</label>
  <input type="text" class="form-control" id="delete_userID" name="delete_userID" readonly/>
</div>
<div class="modal-footer">
  <input type="submit" id="delete" name="delete" class="btn btn-block bt-login" value="Delete" />
    <?php
        if(isset($_POST['delete'])){
            $delete_userID=mysqli_real_escape_string($conn,$_POST['delete_userID']);
            mysql_select_db("data2017", $conn);
            $sql = "DELETE FROM pha_user WHERE id ='".$delete_userID."'";
            $Deletequery=mysqli_query($conn,$sql);
            if($Deletequery){
                echo "<script>alert('Delete Successful.');</script>";
            }
            else{
                echo "<script>alert('Delete Failed.');</script>";
            }
        }
    ?>
</div>

更新

delete_userID是通过JavaScript函数传递的，如下所示。

function bindList() {
    var $table = $('#eventsTable');
    $table.bootstrapTable({
        url: 'list-phaUser.php',
        search: true,
        pagination: true,
        columns: [{
            field: 'userID',
            title: 'User ID',
            sortable: true,
            },{
            field: 'operate',
            title: 'Action',
            align: 'center',
            sortable: true,
            events: operateEvents,
            formatter: operateFormatter
        },],
    });
    $(".fixed-table-toolbar").append("<div id='table-title' class='columns columns-left btn-group pull-left'>User List</div>");
    $("#divFooter").remove();
    $("<div class='row' id='divFooter' style='margin-left:-4%;margin-right:-4%;margin-bottom:-2%;'></div>").insertAfter("#divtb1");
    $("#divFooter").load('footer.php');
}

    window.operateEvents = {
    'click .icon_edit': function (e, value, row, index) {
        $("#edit_userID").val(row.userID);
        $('#edit_model').modal('show');
    },
    'click .icon_delete': function (e, value, row, index) {
        $("#delete_userID").val(row.userID);
        $('#delete_model').modal('show');
    }
};

Answer 1

你没有制作表格。

<div class="modal-body">
    <p>Do you want to delete?</p>
</div>
<form method="POST" action="">
    <div class="form-group">
        <label for="delete_userID" class="control-label">User ID:</label>
        <input type="text" class="form-control" id="delete_userID" name="delete_userID" readonly/>
    </div>
    <div class="modal-footer">
        <input type="submit" id="delete" name="delete" class="btn btn-block bt-login" value="Delete" />
    </div>
</form>
<?php
if (isset($_POST['delete'])) {
    $delete_userID = mysqli_real_escape_string($conn,$_POST['delete_userID']);
    mysql_select_db("data2017", $conn);
    $sql = "DELETE FROM pha_user WHERE id ='".$delete_userID."'";
    $Deletequery = mysqli_query($conn,$sql);
    if ($Deletequery) {
        echo "<script>alert('Delete Successful.');</script>";
    } else {
        echo "<script>alert('Delete Failed.');</script>";
    }
}
?>

Answer 2

尝试使用PDO，因为最新的PHP版本不推荐使用MySQL DB连接。首先，您必须声明表单方法和操作，然后您还必须关闭它。

请尝试以下代码。

<?php
$config = array(
 'host'     => 'localhost',
 'username' => 'db_username',
 'password' => 'db_password',
 'dbname'   => 'data2017'
);

$db = new PDO('mysql:host=' . $config['host'] . ';dbname=' . $config['dbname'], $config['username'], $config['password']);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

if(isset($_POST['delete_userID'])){

 $delete_userID = $_POST['delete_userID'];

 // No need to use mysqli_real_escape_string when we using prepared statements

 $stmt = $db->prepare("DELETE FROM pha_user WHERE id = '$delete_userID' ");
 $stmt->execute();

 if($stmt){
    header("Location:appropriate_page.php?del_success");
 }else{
    header("Location:appropriate_page.php?del_failure");
 }
}
?>

<form method="POST" action="">
<div class="form-group">
  <label for="delete_userID" class="control-label">User ID:</label>
  <input type="text" class="form-control" id="delete_userID" name="delete_userID" readonly/>
</div>
<div class="modal-footer">
  <input type="submit" id="delete" name="delete" class="btn btn-block bt-login" value="Delete" />
</div>
</form>

PHP - SQL - DELETE查询不起作用

2 个答案: