有没有办法让foreach首先显示最新内容(降序ID)？ 我试过找到但我无法使它起作用。
<?php
include_once('includes/connection.php');
include_once('includes/deal.php');
$deal = new Deal;
$deals = $deal->fetch_all();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>GameDeals</title>
<link rel="shortcut icon" type="image/x-icon" href="assets/favicon.png">
<link rel="stylesheet" href="assets/deals.css" />
</head>
<body>
<div class="container">
<!-- START GAMEDEALS -->
<?php foreach ($deals as $deal) { ?>
<div class="deal-info">
<table width="800" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="100">ID: <?php echo $deal['deal_id']; ?></td>
<td width="500"><?php echo $deal['deal_title']; ?></td>
<td width="200">TS: <?php echo $deal['deal_timestamp']; ?></td>
</tr>
</table>
</div>
<div class="deal-content">
<table width="800" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="100"><img src="<?php echo $deal['deal_imageurl']; ?>" width="100" height="100" /></td>
<td width="400"><?php echo $deal['deal_content']; ?></td>
<td>
<table width="300" border="0" cellspacing="0" cellpadding="0">
<tr>
<td>Regular Price: <?php echo $deal['deal_normalprice']; ?></td>
</tr>
<tr>
<td>Offer Price: <?php echo $deal['deal_offerprice']; ?></td>
</tr>
<tr>
<td>Off: <?php echo $deal['deal_percent']; ?></td>
</tr>
</table>
</td>
</tr>
</table>
</div>
<div class="deal-ref">
<table width="800" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="500">URL: <?php echo $deal['deal_url']; ?></td>
<td width="300">ENDS: <?php echo $deal['deal_expire']; ?></td>
</tr>
</table>
</div>
<?php } ?>
<!-- END GAMEDEALS -->
</div>
</body>
</html>
提前致谢!
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最佳答案
如果您无法更改 SQL 查询本身，那么您需要在执行 foreach 之前对数组进行排序。 PHP 的内置 usort函数非常适合这个——它根据数组的值和用户定义的比较函数对数组进行就地排序:
function compareRows($a, $b)
{
if ($a['deal_id'] == $b['deal_id']) {
return 0;
}
return ($a['deal_id'] < $b['deal_id']) ? 1 : -1;
}
usort($deals, "compareRows");
$deals 将按“deal_id”字段降序排列。请记住，这是 MySQL 优化的操作类型，而在 PHP 中执行此操作效率要低得多。
关于PHP: Orderby "ID"foreach，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16594199/