Question

我正在尝试仅在用户在确认对话框中输入yes时才将数据插入mysql，但即使用户输入no，数据也会始终插入到mysql中。这是我的代码..

<?php if (mysqli_num_rows($data_query) >= 1) { ?>
    <script>
        var txt;
        var r = confirm('Duplicate Data! Click OK to Add & Cancel to Cancel it')
        if (r == true) {
            <?php
                $query="INSERT INTO video_data(date) " ;
                $query .= "VALUES('{$date}')";
                $create_video_query=mysqli_query($connection,$query);

                if (!$create_video_query) {
                    die("failed".mysqli_error());
                } else {
                    $success = "Video added succesfully"; 
                }
            ?>
        }          
    </script>
<?php } ?>

Answer 1

在没有php的情况下测试你的代码。

在“点击确定添加并取消以取消它”之后，您错过了分号“”
确保你真的有“if（r == true）”和不“if（r = true）”

我测试了以下代码（删除了php）并且它可以工作：

     <html>
     <body>
     <script>
        var txt;
        var r = confirm('Duplicate Data! Click OK to Add & Cancel to Cancel it');
        if(r==true){
            alert('Clicked OK: Run insert sql');
        } else {
            alert('Clicked Cancel: Do nothing');
        }          
     </script>
     </body>
     </html>

Answer 2

您不能将服务器端（PHP）和客户端（JavaScript）混合在一起以实时进行交互。你必须使用AJAX，或者你必须提交一个表单（一个内置在HTML中或由javascript构建）。这只是一个基本的例子：

<?php
# Checks to see if the form has been submitted
if(isset($_POST['add'])) {
    $query="INSERT INTO video_data(date) " ;
    $query .= "VALUES('{$date}')";
    $create_video_query=mysqli_query($connection,$query);
    if(!$create_video_query) {
        die("failed".mysqli_error());
    }
    else {
        $success = "Video added succesfully"; 
    }
}          
?>

<?php
# I don't know what this is based on (the query) so I don't know if it's required.
# I just left it
if(mysqli_num_rows($data_query) >= 1) { ?>
<script>
var txt;
var r = confirm('Duplicate Data! Click OK to Add & Cancel to Cancel it');
if(r !== false){
    // Assumes there is a form to submit and submits it
    form.submit();
}
</script>
<?php  } ?>

仅当用户在对话框中选择“是”时，才能在php中执行语句

2 个答案: