Question

我有一个“显示更多”按钮的示例代码，我想为“显示较旧”消息在消息页面中更改它，并在消息顶部放置按钮。该示例代码用于显示以前的帖子： a.php：

<div  id="comnts"></div>
<button id="btn" >load more</button>
<script>
$(document).ready(function() {
  var comco = 5;
  var offset = 0;
  $("#btn").click(function() {
    $.ajax({
        method: "POST",
       url: "b.php",
        data: { comnco: comco, offset: offset }
      })
      .done(function(msg) {
        $("#comnts").append(msg);
      });
    offset = offset + comco;
  });

  $("button").trigger("click");
});
</script>

b.php：

$comnco=$_POST['comnco'];
$offset=$_POST['offset'];

$rzp=mysqli_query($conn,"
SELECT * FROM `tbl_users_posts` WHERE uid in (SELECT frname FROM t_frnd WHERE uname='$uid') UNION 
SELECT * FROM `tbl_users_posts` WHERE uid='$uid' ORDER BY id DESC limit $offset, $comnco");

我不是专业程序员，因此在帮助下创建了此代码。我试图更改mysql代码。这段代码显示了我想要的但不能正常工作：

$rzp=mysqli_query($conn,"SELECT * FROM t_msg WHERE
 id >   ((SELECT MAX(id) FROM t_msg) - '$comnco') 
    AND ( (for_u=1 AND u_sender=2) 
    OR  (for_u=2 AND u_sender=1) )");

使用按钮或滚动olso进行此操作的示例代码对我有帮助。谢谢

使用按钮显示以前的消息

0 个答案: