PHP和SQL（尝试使用提交按钮更新我的数据库）

Question

I am trying to update my feedback in my SQL database form with help of submit button but I'm unable to do so. Please help!

if (isset($_POST['submitreport'])) 
            {
                $dbCon = mysqli_connect("localhost","root","","Hun");
                $report = strip_tags($_POST['report']);

                $sql = "UPDATE Feedback SET report='$report' WHERE username='$username' AND date='$date' ";

                $query = mysqli_query($dbCon, $sql);


            }

Answer 1

    <?php
    if (isset($_POST['submitreport'])) 
    {
    $dbCon = mysqli_connect("localhost","root","","Hun");
    $username = 'test';
    $report = strip_tags($_POST['report']);
    $date = date('m-d-Y');

    $sql = "UPDATE Feedback SET report='".$report."' WHERE username='".$username."' AND date='".$date."'";

    $query = mysqli_query($dbCon, $sql);
    }
    ?>