製作查詢顯示最新更新

Question

所以我有一個腳本，顯示所有與主題信息相關的主題，我想知道是否有人可以幫我做到這一點，所以每當有人評論它或如果該帖子被編輯它將它撞到查詢的第一行echod？

function getReplies($id){ 
     $q = @mysql_query("SELECT reply_content, reply_date, reply_by FROM replies WHERE reply_id='$id'"); 
     if(!$q){ 
      echo 'Error: '.mysql_error(); 
     } 

     $res = mysql_fetch_array($q); 
     $q2 = @mysql_query("SELECT `topic_subject` FROM `topics` WHERE `topic_id`='$id'"); 
     if(!$q2){ 
      echo 'Error: '.mysql_error(); 
     } 

     $res2 = mysql_fetch_array($q2); 
     if($_SESSION['id'] == $res['reply_by']){ 
      echo '<div class="panel panel-default"> 
    <div class="panel-heading"><b>'.$res2['topic_subject'].'</b></div> 
    <div class="panel-body"> 
    '.nl2br($res['reply_content']).' 
    </div> 
       <div class="panel-footer"> 
        Posted By <strong><a href="../public.php?id='.$res["reply_by"].'">'.getOwner($res['reply_by']).'</stong></a> 
        on <strong>'.$res['reply_date'].'</strong><br /> 
        <a href="edit.php?id='.$id.'">Edit</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;<a href="delete.php?id='.$id.'">Delete</a> 
       </div> 
</div> 
      </div>'; 
     } else { 
      echo'<div class="panel panel-default"> 
    <div class="panel-heading"><b>'.$res2['topic_subject'].'</b></div> 
    <div class="panel-body"> 
    '.nl2br($res['reply_content']).' 
    </div> 
       <div class="panel-footer"> 
        Posted By <strong><a href="../public.php?id='.$res["reply_by"].'">'.getOwner($res['reply_by']).'</stong></a> 
        on <strong>'.$res['reply_date'].'</strong><br /> 
       </div> 
</div> 
      </div>'; 
     } 

    } 

評論：

帖子：

主題：

Answer 1

試圖改變自己的第一個查詢，並授予它的ORDER BY，也許？

$q = "SELECT reply_content, reply_date, reply_by 
     FROM  replies 
     WHERE reply_id='$id' 
     ORDER BY reply_date DESC"; 

在我看來，你也使用兩個查詢，你只需要使用兩個查詢。

更新：優化代碼，儘量不重複自己，並加入查詢

function getReplies($id) { 

     $query = "SELECT replies.reply_content, 
         replies.reply_date, 
         replies.reply_by 
         topics.topic_subject 
       FROM  replies, 
         topics 
       WHERE replies.reply_id = topics.topic_id 
        AND replies.reply_id = '$id' " . //<== PS: You should sanitize this $id parameter 
       " ORDER BY replies.reply_date DESC"; 
       // You can replace the replies.reply_date column by whatever you end up with for sorting 

     // Important note - Look into mysqli, mysql is deprecated and too old to be used these days. 
     $q = @mysql_query($query); 

     if(!$q) { 
      echo 'Error: '.mysql_error(); 
     } 

     $res = mysql_fetch_array($q); 

     $output = ' 
     <div class="panel panel-default"> 
      <div class="panel-heading"><b>'.$res['topic_subject'].'</b></div> 
      <div class="panel-body"> 
       '.nl2br($res['reply_content']).' 
      </div> 
      <div class="panel-footer"> 
       Posted By <strong><a href="../public.php?id='.$res["reply_by"].'">'.getOwner($res['reply_by']).'</stong></a> 
       on <strong>'.$res['reply_date'].'</strong><br />'; 

     if($_SESSION['id'] == $res['reply_by']) 
     $output .= '<a href="edit.php?id='.$id.'">Edit</a>&nbsp;&nbsp;&nbsp;|&nbsp;&nbsp;&nbsp;<a href="delete.php?id='.$id.'">Delete</a>'; 

     $output .= ' 
      </div> 
      </div> 
     </div>'; 

     echo $output; 

    }