问如何使用php删除表格中的特定行

EN

<thead>
   <tr>
      <th>Identity</th>
      <th>Name</th>
      <th>Stuff</th>
      <th>Action(Delete)</th>
   </tr>
</thead>
<tbody>
   <?php
      $con=mysqli_connect("","","","");
      // Check connection
      if (mysqli_connect_errno())
      {
      echo "Error " . mysqli_connect_error();
      } 

      $result = mysqli_query($con,"SELECT * FROM sm_admins");

      while($row = mysqli_fetch_array($result))
      {
      echo "<tr>";
      echo "<td>" . $row['identity'] . "</td>";
      echo "<td>" . $row['name'] . "</td>";
                                          switch ($row['level']) {
                                              case "hello" : echo "<td>Nice Try</td>";
                                                  break;
                                              case "bye" : echo "<td>Row in a row</td>";
                                                  break;
                                              case "Cake" : echo "<td>Lemon</td>";
                                                  break;
                                              case "ao" : echo "<td>Key</td>";
                                                  break;
                                              case "as" : echo "<td>Charger</td>";
                                                  break;

                                          echo "<td> <button class='btn btn-red btn-icon-only' onclick='deleterow(" . $row['identity'] . ")> <i class='fa fa-times'></i> </button></td>";
                                        }
      echo "</tr>";
      }
      echo "</table>";

      mysqli_close($con);
      ?>