aids

<!DOCTYPE html>
<html lang="en-GB">
    <head>
        <title>test2.php</title>
        <link rel="stylesheet" href="uplaod1.css">
    </head>
    <body>
        <div class="heading">
            <h2> T0 do list</h2>
        </div>
        <form method="post" action="">
            <?php
            $db = mysqli_connect("localhost", "root", "root", "todo") or die("QUERY failed". mysqli_error($db));
            if (isset($_POST['task'])) {
                    $task = $_POST['task'];
                    $query = "INSERT INTO tasks(task) VALUES('$task')";

                if(!$run_query = mysqli_query($db, $query)) {
                    printf('QUERY failed -- ' . mysqli_error($db) . '<br />');
                } else {
                    printf('QUERY ok<br />');
                }
            }
            ?>
            <input type="text" name="task" class="task" />
            <button type="submit" class="add_btn" name="submit">Add the task</button>
        </form>
        <table>
            <thead>
                <tr>
                    <th>N</th>
                    <th>&nbsp;</th>
                    <th>Tasks</th>
                    <th>&nbsp;</th>
                    <th>Action</th>
                    <th>&nbsp;</th>
                    <th>Delete</th>
                    <th>&nbsp;</th>
                </tr>
            </thead>
            <tbody>
              <?php
             $run_task = mysqli_query($db, "SELECT * FROM tasks LIMT 20");
             while ($row = mysql_fetch_assoc($run_task))
             {
               $id = $row['id'];
               $task1 = $row['task'];

               ?>
             <tr>

               <td>?php echo $id; ?> </td>
               <td>?php echo $task1; ?> </td>
              <td class = "delete"> <a href="index.php?delete=<?php echo $id;?>"> X</a></td>
             </tr>


             <?php } ?>
            </tbody>
            <?php
             if(isset($_GET['delete']))
             {
               $delete = $_GET['delete'];
               $query = "DELETE FROM tasks WHERE id = '$delete'";
               $run - mysqli_query($db,$query);
               if (!$run)
               {
                 echo "this wont work";
               }
               else
               {
                 header('location: index.php');
               }
             }
            ?>
        </table>
    </body>
</html>