如何对MySQL结果进行排序，然后获取PHP中最新的10个日期时间的标识

Question

如何从MySQL $row[id]和$row[timestamp]中获取id和时间戳记结果，并对结果进行排序并获取具有最新匹配时间戳的id数组？ 所以，如果我的MySQL数据库中有这个数据，

3,2015-08-24 10:38:31，34,2015-08-24 10:38:16，8,2015-08-24 10:38:51

我会为了从最新到最旧的时间戳，最终落得一个数组，该ID的的。

8,3,34

这里是我的代码省略信息。

$servername = "IP:PORT"; 
$username = "USERNAME"; 
$password = "PASSWORD"; 
$dbname = "DB"; 
$conn = new mysqli($servername, $username, $password, $dbname); 
if ($conn->connect_error) { 
    die("Connection to the database failed. Please try again. Error: " . $conn >connect_error); 
} 
$sql = "SELECT id, timestamp FROM posts ORDER BY timestamp DESC LIMIT 1,10;"; 
$result = $conn->query($sql); 
$arrays = array(); 
if ($result->num_rows > 0) { 
    while($row = $result->fetch_assoc()) { 
     $arrays[] = $row[id]; 
    } 
} 
foreach ($arrays as $key => $id) { 
    $servername = "IP:PORT"; 
    $username = "USERNAME"; 
    $password = "PASSWORD"; 
    $dbname = "DB"; 
    $conn = new mysqli($servername, $username, $password, $dbname); 
    if ($conn->connect_error) { 
     die("Connection to the database failed. Please try again. Error: " . $conn->connect_error); 
    } 
    $sql = "SELECT name,timestamp,text FROM posts WHERE id=\"" . $id . "\";"; 
    $result = $conn->query($sql); 
    $arrays = array(); 
    if ($result->num_rows > 0) { 
     while($row = $result->fetch_assoc()) { 
      $date = date_create_from_format('Y-m-d H:i:s',$row[timestamp]); 
      $timezone = new DateTimeZone('America/Los_Angeles'); 
      $timedate = date_timezone_set($date, $timezone); 
      $finaltimedate = $timedate->format('Y-m-d h:i:s A'); 
      echo "<hr><h4>" . $row[name] . "<span style=\"float:right\">Time Posted: " . $finaltimedate . "</span></h4><br>"; 
      echo $row[text] . "<br>"; 
     } 
    } 
} 

然而，当我重新加载该页面，它只是显示了相同的，ID = 0，博客文章而不是发布0和4（仅2个）的2。

Answer 1

如果我正确理解你的问题，那么这个查询应该适合你。

SELECT id, timestamp FROM TABLE_NAME ORDER BY timestamp DESC LIMIT 1,10;