Question

我正在尝试在以下代码中找到合适的代码来替换mysql_result：

$per_page = 9;

 $page_query = mysql_query("SELECT COUNT(*) FROM products");
 $pages = ceil(mysql_result($page_query, 0) / $per_page);

 $page = (isset($_GET['page'])) ? (int)$_GET['page'] : 1;
 $start = ($page - 1) * $per_page;

 $result = mysql_query("SELECT * FROM products  ORDER BY product_id DESC LIMIT $start, $per_page");

这就是我所做的，但我不确定它会起作用：

$per_page = 9;
  $page_query = $conn->query("SELECT COUNT(*) FROM food");
  $pages = ceil(fetch_assoc($page_query, 0) / $per_page);

  $page = (isset($_GET['page'])) ? (int)$_GET['page'] : 1;
  $start = ($page - 1) * $per_page;

  $sql = "SELECT * FROM food  ORDER BY food_id DESC LIMIT $start, $per_page";

$pages = ceil(fetch_assoc($page_query, 0) / $per_page);会有效吗？

Answer 1

建议不要使用Mysqli。

这就是推荐PDO作为mysql ext替换

的原因

$per_page = 9; 
$count = $conn->query("SELECT COUNT(*) FROM food")->fetchColumn();
$pages = ceil($count / $per_page);

看，它比你的旧代码更简单。

以下是我写的PDO tutorial，您可以尝试看看它可以大大简化您的任务。

Answer 2

尝试使用mysqli，在执行完查询后，您必须以数组或对象的形式获取，然后根据计数继续。在下面我提到了一些变化。试试吧，它可以帮到你

<?php

$per_page = 9;

$page_query = mysqli_query($conn, "SELECT COUNT(*) as count FROM products");
$row = mysqli_fetch_assoc($page_query);
$page = ceil($row['count'], 0) / $per_page);

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

 $result = mysqli_query("SELECT * FROM products  ORDER BY product_id DESC LIMIT $start, $per_page");

用mysqli代码替换mysql_result

2 个答案: