使用PDO连接到数据库

Question

我用此代码（php）来连接数据库，但有些想法错误，我得到了一些错误的DOM。 这是我的代码：

<!-----Toggle switch button On/Off.
     --->
  <div class = "wrapper" align = "center">
  <div class="btn-group" id="toggle_event_editing">
  <button type="button" class="btn btn-danger locked_active">OFF</button>
 <button type="button" class="btn btn-success unlocked_inactive">ON</button>
</div> 
<div class="alert alert-danger" id="switch_status">Switched off.</div>
  </div>
 <br/> 

 // button for switch functionality on/off.
  $(document).ready(function() {
    $('#toggle_event_editing button').click(function(){
      if($(this).hasClass('locked_active')) {
      $('#switch_status').html('Switched off');
        var makers = [{"dev_id":"mkr1300", "payload_raw":"AAA"}];
        $.ajax({
          url:'https://integrations.thethingsnetwork.org/ttn-eu/api/v2/down/acts083_test/mkr1300?key=ttn-account-v2.7Ph6lBffU7wI9cLY5ljIhIb_I7sqH5EVvo5zs9uVyA0',
          type:'POST',
          data:JSON.stringify({Makers:makers}),
          contentType: "application/json; charset=utf-8",
          dataType:"json",
         success:function(response){
         alert(response);
          },
         error:function() {
           $('#error').text("There was an error while processing your request. Please try again");
          }
        }); 

    }else{
    $('#switch_status').html('Switched on.');
      var makers = [{"dev_id":"mkr1300", "payload_raw": "AAE"}];
    $.ajax({
      url:'https://integrations.thethingsnetwork.org/ttn-eu/api/v2/down/acts083_test/mkr1300?key=ttn-account-v2.7Ph6lBffU7wI9cLY5ljIhIb_I7sqH5EVvo5zs9uVyA0',
      type:'POST',
      data:JSON.stringify({Makers:makers}),
      contentType:"application/json; charset=utf-8",
      dataType:"json",
      success:function(response) {
      alert(response);
      },
      error:function() {
      $('#error').text("There was an error while processing your request.Please try again");
      }
    });
    }
    });
  });

  

注意：未定义的属性：第18行的C：\ laragon \ www \ panier \ connexion.php中的stdClass :: $ message

     

注意：未定义的属性：第18行的C：\ laragon \ www \ panier \ connexion.php中的stdClass :: $ message

感谢您的帮助