Question

我很新，所以对我很轻松。我已经看过许多与此主题相关的教程和问题。我试图找出我做错了什么，因为我似乎无法使用我准备好的陈述进行分页。我的数据库目前有10行应该返回。我将尝试添加选项以便稍后插入更多行，以便更改数字。这是数据库查询和代码。

//determine how many results are available in database

  $sqlPosts = "SELECT
                count(post_owner)
                FROM post_table";

  $stmt = $db -> prepare($sqlPosts);
  $stmt->execute();
  $stmt->store_result();
  $stmt->bind_result($totalPosts);
  $stmt->fetch();
  //determine which page user is currently on
  if (!isset($_GET['page']))
  $current_Page = 1;
  else
  $current_Page = $_GET['page'];
  // define how many results you want per page
  $page = 1;
  $rowsPerPage = 5;
  //total number of available pages
  $total_Pages  = ceil($totalPosts/$rowsPerPage);
  // determine the sql LIMIT starting number for the results on the displaying page
  $start_from = ($page - 1) * $rowsPerPage;


  // retrieve selected results from database and display them on page
  $sql = "SELECT
              body_of_post,
              date_time,
              post_owner,
              title,
              id
          FROM
              post_table
          ORDER BY
              date_time
          DESC LIMIT
              ?,?";
  $stmt = $db->prepare($sql);
  $stmt->bind_param('dd', $start_from, $rowsPerPage);
  $stmt->execute();
  $stmt->store_result();
  $stmt->bind_result($body_of_post, $date_time, $post_owner, $title, $id);
while ($stmt->fetch()) {
  echo '<table border="1">
        <tr>
          <td bgcolor="#CCCCCC">Title</td>
          <td bgcolor="#CCCCCC">Post</td>
          <td bgcolor="#CCCCCC">Created by</td>
          <td bgcolor="#CCCCCC">Date</td>
        </tr>
        <br>';
    echo
    '<tr><th><h2>"' . $title .'"</th>
    <th>'. $body_of_post. '</th>
    <th>'. $post_owner. '</th>
    <th>'. $date_time. '</tr></th></h2>';
  }

我认为我的问题是在while循环中，但我不确定如何编码它。分页部分应该没问题。当我单击Next链接时，我看到index.php？page =将会更新，但数据库行保持不变。我想page = 1显示数据库中的前5行而不是page = 2应显示接下来的5行，依此类推。

这是分页部分。

if($current_Page > 1){
    $prev_page = $current_Page - 1;
    $previous = "<a href=\"index.php?page=$prev_page\">Previous</a>";
  }

  if ($total_Pages > 1){
      for($page = 1; $page <= $total_Pages; $page++){
          if ($page == $current_Page){
            $page_count = "";
          }
          else
            echo "<a href=\"index.php?page=$page\">Next$rowsPerPage</a>";
         }
      echo $page_count;
}

Answer 1

问题出在以下几行：

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

您将$page变量设置为修复1，因此只显示第一组记录。将此行更改为

$start_from = ($current_Page - 1) * $rowsPerPage;

使用网址中提供的page参数。

PHP - 准备好的语句分页

1 个答案: