如何从while循环中删除或编辑特定的结果行？

Question

我不知道如何获取每个特定的ID并将其添加到以下查询中。

    $id = '';
    $del = '';
    $del .="<form action=".$_SERVER['PHP_SELF']." method='POST'>";
    $del .="<input type=\"submit\" name=\"delete\" value=\"Delete\" /></form>";
    if(isset($_POST['delete'])){
        $del_sql = "DELETE FROM users WHERE id=$id"; //i can't fetch id.
        $del_qry = mysqli_query($link, $del_sql);
    }

以下是从mysql获取和显示数据的代码。

$display_list = ''; 
    while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){
        $id = $row['id'];
        $name = $row['name'];
        $email = $row['email'];

        $display_list .= '<p>'.$id.'<br /> '.$name.'<br /> '.$email.' </p>'.'<p>'.$del.'</p>';

    }