Question

我有一个值通过$ _POST传递到我的搜索结果页面并存储在名为$ term的变量中。然后变量在MySQL查询中，然后运行以显示搜索结果，如果有超过15个结果，我有一个分页php脚本，将结果分成几页。

第一页很棒，找到了正确的结果数量，并且可以使用正确的页数。如果我回显变量，则将正确的值存储在其中。但是，如果我选择查看下一批结果并且页面刷新，则会列出表的所有行（就好像查询只是SELECT *而没有参数）并且变量现在为空

这是我的代码（有点长，对不起，我打算把它放在另一个页面中，并在它正常工作后加入它）

    <?php
$tbl_name="accounts";
$adjacents = 3;


if (isset($_POST['basic_search_submit'])){
$term = $_POST['item'];}

$query = "SELECT COUNT(*) as num FROM accounts LEFT JOIN accounts_cstm ON accounts.id = accounts_cstm.id_c  WHERE accounts.name LIKE '%$term%' ORDER BY accounts.name";
$total_pages = mysql_fetch_array(mysql_query($query));
$total_pages = $total_pages[num];

    $targetpage = "search_results_play.php";    
$limit = 15;                                
$page = $_GET['page'];
if($page) 
    $start = ($page - 1) * $limit;          
else
    $start = 0;                             
    $sql = "SELECT * FROM accounts LEFT JOIN accounts_cstm ON accounts.id = accounts_cstm.id_c WHERE accounts.name LIKE '%$term%' ORDER BY accounts.name LIMIT $start, $limit";
$result = mysql_query($sql);
if ($page == 0) $page = 1;                  
$prev = $page - 1;                          
$next = $page + 1;                          
$lastpage = ceil($total_pages/$limit);      
$lpm1 = $lastpage - 1;                      
$pagination = "";

if($lastpage > 1)
{   
    $pagination .= "<div class=\"pagination\">";
            if ($page > 1) 
        $pagination.= "<a href=\"$targetpage?page=$prev\">&#60; &#60; previous</a>";
    else
        $pagination.= "<span class=\"disabled\">&#60; &#60; previous</span>";   

            if ($lastpage < 7 + ($adjacents * 2))
    {   
        for ($counter = 1; $counter <= $lastpage; $counter++)
        {
            if ($counter == $page)
                $pagination.= "<span class=\"current\">$counter</span>";
            else
                $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
        }
    }
    elseif($lastpage > 5 + ($adjacents * 2))    //enough pages to hide some
    {
                    if($page < 1 + ($adjacents * 2))        
        {
            for ($counter = 1; $counter < 4 + ($adjacents * 2); $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<span class=\"current\">$counter</span>";
                else
                    $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
            }
            $pagination.= "...";
            $pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
            $pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";       
        }
                    elseif($lastpage - ($adjacents * 2) > $page && $page > ($adjacents * 2))
        {
            $pagination.= "<a href=\"$targetpage?page=1\">1</a>";
            $pagination.= "<a href=\"$targetpage?page=2\">2</a>";
            $pagination.= "...";
            for ($counter = $page - $adjacents; $counter <= $page + $adjacents; $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<span class=\"current\">$counter</span>";
                else
                    $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
            }
            $pagination.= "...";
            $pagination.= "<a href=\"$targetpage?page=$lpm1\">$lpm1</a>";
            $pagination.= "<a href=\"$targetpage?page=$lastpage\">$lastpage</a>";       
        }

        else
        {
            $pagination.= "<a href=\"$targetpage?page=1\">1</a>";
            $pagination.= "<a href=\"$targetpage?page=2\">2</a>";
            $pagination.= "...";
            for ($counter = $lastpage - (2 + ($adjacents * 2)); $counter <= $lastpage; $counter++)
            {
                if ($counter == $page)
                    $pagination.= "<span class=\"current\">$counter</span>";
                else
                    $pagination.= "<a href=\"$targetpage?page=$counter\">$counter</a>";                 
            }
        }
    }


    if ($page < $counter - 1) 
        $pagination.= "<a href=\"$targetpage?page=$next\">next &#62; &#62;</a>";
    else
        $pagination.= "<span class=\"disabled\">next &#62; &#62;</span>";
    $pagination.= "</div>\n";       
}
?>

  <? while ($row = mysql_fetch_array($result)){
 //table displaying results
 }
?>
<?=$pagination?>

非常感谢任何帮助，谢谢

Answer 1

PHP中的变量不会跨页面持久存在。当然，除了其中一些，但常规$page或$whatever将不会持续存在。您将加载一个页面，其中包含一些变量，然后在页面完全加载到浏览器后，这些变量将消失。

建议在所有页面的脚本顶部使用session_start()，并使用$_SESSION['variable']=...存储变量。这样，它们将持续跨页。

最简单的解决方法：

$page = $_GET['page'];

用这个替换该行：

$page = isset($_SESSION['page']) && is_numeric($_SESSION['page']) ? $_SESSION['page'] : 0;
$_SESSION['page'] = $page;

并在每个脚本的顶部添加session_start()。如果您有一个公共头包含，或者带有mysql身份验证数据的config.php，请将它放在该文件的顶部。

Answer 2

另一种解决方案是使用GET请求进行搜索，并按$_GET['term']获取该字词，并附加到生成的链接'&term='. $_GET['term']。这很简单。使用$_SESSION['term']的主要缺点是，如果您将页面留给主页，例如，此变量将保持设置，直到会话过期，并可能导致未来的麻烦。

PHP分页在其他页面上丢失变量

2 个答案: