尝试插入带有文章ID的评论

Question

我正在开发基于文章（产品）的网站，我希望用户发表评论......

我正在从产品网址中获取产品ID ...并通过插入查询插入注释但不知道为什么会失败...任何帮助??? 我回应查询及其显示数据

 <form action="" method="post">
<label style="color: red; font-size: 17px;">Commenter *</label><br>
<input type="text" name="c_name" style="margin-left: 0px; width:    200px;     border: 1px groove black;" required="required" placeholder="   Specify your name"/><br>
<br>

 <label style="color: red; font-size: 17px">Comment *</label><br>
<textarea  style="margin-left: 0px; width: 400px; height: 200px;   border:  1px groove black;"required="required" name="c_msg"></textarea><br>
<input style="float: right; margin-right: 280px; width: 80px; background- color: #e99067; color: white; font-family: serif;" type="submit"  name="commentit" value="Publish">

  include('includes/connect.php');
  if(isset($_GET['pro_id'])){
   $product_id=$_GET['pro_id'];

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


     $c_name=$_POST['c_name'];
    $c_msg=$_POST['c_msg'];

   $add_c="insert into comments      
 (product_id,comment_name,comment_date,comment_msg)
            values ('$c_name',Date(),'$c_msg','$product_id')";

    $run_c=mysqli_query($con, $add_c);

        if($run_c){

                            echo "<script>alert('Comment Published   


Successfully')</script>";
                                echo  
     "<script>window.open('index.php','_self')</script>";
                        }
                        else {
                            echo "nothing done";
                        }