请我需要插入一个表数据的值到数据库中使用后提交，但我似乎没有得到它的权利。。。代码不完整，我只需要任何人把我通过后提交数据。

<?php 
    if(isset($_POST['submit'])){
        $title        = $_POST[$product['title']];
        $slug         = $_POST[$product['slug']];
        $slug         = $_POST[$product['description']];
        $quantity     = $_POST[$product['quantity']];
        $subTotal     = $_POST[number_format($total, 2) ];
      }
    ?> 
   // i guess my post submit is wrong...

     <table class="table table-striped">
                    <tr>
                        <th colspan="7"><h3 class="text-center">Order details</h3></th>
                    </tr>
                    <tr  class="btn bg-success">
                        <th>Title</th>
                        <th>Slug</th>
                        <th>Description</th>
                    </tr>
                    <form method="post" action="cart.php">
                    <tr>
                        <td class="text-info" name="title"><?php echo $product['title']; ?></td>
                        <td class="text-info"><?php echo $product['slug']; ?> </td>
                        <td class="text-info"><?php echo $product['description']; ?> </td>

                            <input type="submit" name="submit" class="btn btn-success text-right" value="Checkout" onClick="return confirm('you will be redirected .....');" /> <!-- submit button -->

                </table>
All i need is to post to the database after clicking the submit button. Thank You.