Question

我有一個我建立的私人消息系統的MySQL/PHP代碼。它很好用，儘管我對這一切都很陌生，所以努力讓消息線程以最新的方式顯示。有沒有機會提供建議？當前代碼如下：

$result = ''; 

$nowTime = time(); 

$getmessages = mysql_query("SELECT * FROM messages WHERE msg_to = '$session_memberid' GROUP BY msg_from ORDER BY ID DESC"); 
while($iamessages = mysql_fetch_array($getmessages)) 
{ 
$msg_id = $iamessages['ID']; 
$msg_from = $iamessages['msg_from']; 
$msg_conversation = $iamessages['conversation']; 



$getmsgdata = mysql_query("SELECT * FROM messages WHERE msg_to = '$session_memberid' AND msg_from = '$msg_from' ORDER BY ID DESC LIMIT 1"); 
while($imsd = mysql_fetch_array($getmsgdata)) 
{ 
$msg_message = $imsd['msg_message']; 
$msg_time = $imsd['time']; 
$msg_read = $imsd['msg_read']; 
} 

$msg_conversation = suitcrypt($msg_conversation); 

if ($msg_read == 'no') { $msgclass = "messagepostunread"; } else { $msgclass = "messagepost"; } 

$getfromdata = mysql_query("SELECT FullName, Username, status FROM members WHERE ID = '$msg_from'"); 
while($ifd = mysql_fetch_array($getfromdata)) 
{ 
$msg_from_name = $ifd['FullName']; 
$msg_from_username = $ifd['Username']; 
$msg_from_status = $ifd['status']; 
} 

$getfromdata1 = mysql_query("SELECT Link FROM images WHERE MemberID = '$msg_from' AND is_primary = 'yes'"); 
while($ifd1 = mysql_fetch_array($getfromdata1)) { 
$msg_from_img = $ifd1['Link']; 
} 

$timepass = timing($msg_time); 
if ($timepass == 'data') { 
$timepass = date("dS M", $msg_time); 
} 

if (($msg_from_status == 'full') || ($msg_from_status == 'active')) { 

$result .= " 
     <div class=\"$msgclass\" onclick=\"showconversation('$msg_conversation');\"> 
     <img src=\"m/members_image/$msg_from/thumb-$msg_from_img\" class=\"feedpic\" width=\"55\" height=\"55\" /><div class=\"messageposttext\"><a href=\"/$msg_from_username\">$msg_from_name</a>:<div class=\"inboxfeedreply\">Reply &nbsp; &middot; &nbsp; $timepass</div><br />$msg_message</div> 
     </div> 
     <div class=\"splittermessages\"></div> 
"; 
} 

在消息表的每個表項中都有一個'時間'標記。以下是時間條目的示例：1367680391.首先通過最新回覆排序線索的最佳方式是什麼？

Answer 1

首先，我認爲您應該按$ msg_conversation進行分組，並查找每個對話的最後日期。使用下面的代碼，您可以根據每個對話/線程所輸入的最後一條消息來排列對話。

$result = ''; 

$nowTime = time(); 

$getmessages = mysql_query("SELECT conversation, max(date) FROM messages WHERE msg_to = '$session_memberid' GROUP BY conversation ORDER BY max(date)"); 
while($iamessages = mysql_fetch_array($getmessages)) 
{ 
$msg_conversation = $iamessages['conversation']; 
... 

此外，您可以按日期降序獲取每個對話的消息。

Answer 2

我得到了別人幫助，答案是更新查詢到以下幾點：

$getmessages = mysql_query("SELECT * FROM messages WHERE msg_to = '$session_memberid' GROUP BY msg_from ORDER BY MAX(time) DESC");