上一个/下一个加载导航链接的导航问题

Question

我以前使用过这个代码，没有问题，但...现在我似乎无法加载页面请求时，按下上一个/下一个导航，如果你能看到我出错的地方帮忙。

<?php 
include 'config.php'; 

$db = mysql_connect($host, $username, $password); 
    mysql_select_db($db_name,$db); 

     $sql = "SELECT u_id FROM users"; 
     $query = mysql_query($sql,$db); 
     $total_results = mysql_num_rows($query); 
     $limit = "5"; //limit of archived results per page. 
     $total_pages = ceil($total_results/$limit); //total number of pages 
if (empty($page)) 
    { 
     $page = "1"; //default page if none is selected 
    } 
$offset = ($page - 1) * $limit; //starting number for displaying results out of DB 

    $query = "SELECT * FROM users ORDER BY u_id LIMIT $offset, $limit"; 
    $result = mysql_query($query); 
//This is the start of the normal results... 

    while ($row = mysql_fetch_array($result)) 
     { 
     ?> 
<HR> 
Username : <B><?echo $row['uname'] ?></B><BR> 
user Message: <?echo $row['umess'] ?> 

<BR> 


<? 
     } 
     mysql_close(); 

// This is the Previous/Next Navigation stuff having issue with 

echo "<font face=Verdana size=1>"; 
echo "Pages:($total_pages)&nbsp;&nbsp;"; // total pages 
if ($page != 1) 
{ 
echo "<a href=?&page=1><< First</a>&nbsp;&nbsp;&nbsp;"; // First Page Link 
$prevpage = $page - 1; 
echo "&nbsp;<a href=?page=$prevpage><<</a>&nbsp;"; // Previous Page Link 
} 
     if ($page == $total_pages) 
      { 
       $to = $total_pages; 
      } 
     elseif ($page == $total_pages-1) 
      { 
       $to = $page+1; 
      } 
     elseif ($page == $total_pages-2) 
      { 
       $to = $page+2; 
      } 
     else 
      { 
       $to = $page+3; 
      } 
     if ($page == 1 || $page == 2 || $page == 3) 
      { 
       $from = 1; 
      } 
     else 
      { 
       $from = $page-3; 
      } 

for ($i = $from; $i <= $to; $i++) 

    { 
    if ($i == $total_results) $to=$total_results; 
    if ($i != $page) 
     { 
     echo "<a href=?showold=yes&page=$i>$i</a>"; 
     } 
    else 
     { 
     echo "<b><font face=Verdana size=2>[$i]</font></b>"; 
     } 
    if ($i != $total_pages) 
     echo "&nbsp;"; 
    } 
if ($page != $total_pages) 
{ 
$nextpage = $page + 1; 
echo "&nbsp;<a href=?page=$nextpage>>></a>&nbsp;"; // Next Page Link 
echo "&nbsp;&nbsp;&nbsp;<a href=?page=$total_pages>Last >></a>"; // Last Page Link 
} 
echo "</font>"; 



?> 

试运行后，你可以看到第一个页面请求是罚款，直到您点击旁边或者它让回到第一页的页码。

Answer 1

而不是

if (empty($page)) 
{ 
    $page = "1"; //default page if none is selected 
} 

尝试：

if (isset($_GET['page'])) 
{ 
$page = $_GET['page']; 
} 
else 
{ 
$page = 1; 
}