Question

在单击删除按钮后尝试删除行，但是即使没有错误，也行不通。起初，我认为这与if语句有关，但是什么都没有改变……这是我的删除代码！还有其他办法吗？谢谢

<?php
                echo "<table>
                          <caption>Λίστα Χρηστών</caption>
                          <thead>
                            <tr>
                              <th scope='col'>Ιd</th>
                              <th scope='col'>Χρήστης</th>
                              <th scope='col'>Διαγραφή</th>
                            </tr>
                          </thead>";
                  $servername = "localhost";
                  $username = "root";
                  $password = "";
                  $db = "aws_chat";


                  // Create connection
                  $conn = new mysqli($servername, $username, $password, 
                  $db);
                  // Check connection

                  $sql = "SELECT username,email,id FROM users WHERE 
                  user_type='user'";
                  $result = $conn->query($sql);

                  if ($result->num_rows > 0) {
                      // output data of each row

                  if (isset($_GET['del'])) {
                        $del = $_GET['del'];
                        //SQL query for deletion.
                        $sql_del = "DELETE * FROM users WHERE id=$del";
                    }
                      while($row = $result->fetch_assoc()) {
                          echo "<tbody>
                                    <tr>
                                      <td>".$row["id"]."</td>
                                      <td>".$row["username"] ."</td>
                                      <td><a href='delete_user.php?del= 
                      {$row['id']}'><input type='button' class='btn_del' 
                      value='Delete'/></td>
                                    </tr>
                                </tbody>
                                  <tfoot>

                                  </tfoot>";
                      }
                  } else {
                      echo "0 results";
                  }
                  echo "</table>";

                  ?>
            </center></div>

Answer 1

更改

DELETE * FROM users WHERE id=$del

到

DELETE FROM users WHERE id=$del

Answer 2

//SQL query for deletion.
$sql_del = "DELETE FROM users WHERE id='".$del."' ";
$conn->query($sql_del); // you missed this line which is required to delete the record from database

试图从数据库（phpmyadmin）onclick

2 个答案: