php - MySQL 与 RAND() 和 1 DESC 相关的问题？

Question

我使用数据库创建了一个图库。所有图像都随机显示在主页上。现在我需要向导航栏添加一个新的“最新”index.php/latest.php 类别。

我正在使用无限滚动和一个随机排序的小技巧$rand=date("i");。

问题: ORDER BY 1 DESC 不适用于 index.php/latest.php，因为我已在主页。如何在不更改主页顺序的情况下在最新页面上按降序排序？

index.php

<?php

include ("sqli.php");
$rand=date("i");

$seed=($rand);
$per_page = 9;
if (isset($_GET["page"])) {

    $page = $_GET["page"];
}
else {
    $page=1;
}

$start_from = ($page-1) * $per_page;

$query = "SELECT * FROM data ORDER BY RAND($rand) LIMIT $start_from, $per_page";

$result = mysqli_query ($con, $query);

<?php while ($row = mysqli_fetch_array($result)) { ?>

?>

<div id="gallery here"></div>

<?php> } ?>

latest.php

<?php

include ("sqli.php");
$per_page = 9;
if (isset($_GET["page"])) {

    $page = $_GET["page"];
}
else {
    $page=1;
}

$start_from = ($page-1) * $per_page;

$query = "SELECT * FROM data ORDER BY 1 DESC LIMIT $start_from, $per_page";

$result = mysqli_query ($con, $query);
?>

<?php while ($row = mysqli_fetch_array($result)) { ?>

?>

<div id="gallery here"></div>

<?php> } ?>

Answer 1

您必须在last.php中通过createdAt字段(通过您的日期字段)设置顺序:

$query = "SELECT * FROM data ORDER BY createdAt DESC LIMIT $start_from, $per_page";