Php 在搜索栏中，当我搜索键的时候，它仍然会使整个页面并没有页面，无论表中是否有匹配项

当我在搜索栏中搜索时，它不会根据搜索键元素生成完全没有页面，这里是代码

<?php               
                 $total_num_page=2;
               if (isset($_GET['page']))
                    {
                        $page_id = $_GET['page'];
                    } 
               else
                    {
                        $page_id = 1;
                    }
                    $search = '' ;
                    if( isset($_POST['search']) )
                    {
                        $search = urldecode($_POST['search']);
                    }
                    else if( isset($_GET['search']) ) 
                    {
                        $search = urldecode($_GET['search']);
                    }
              if ( $search )
              {
                        $all_post_query = "select * from files where recieved_by like '%" . $search . "%' or processed_by like  '%" . $search . "%' or   purpose like  '%" . $search . "%' or file_name like  '%" . $_SESSION["search"] . "%' order by date desc";
                        $all_post_run = mysqli_query($con, $all_post_query);
                        $all_post = mysqli_num_rows($all_post_run);
                        $total_page = ceil($all_post / $total_num_page);
                        $page_start_from = ($page_id - 1) * $total_num_page;
              } 
               else {
                    $all_post_query = "select * from files order by date desc";
                    $all_post_run = mysqli_query($con, $all_post_query);
                    $all_post = mysqli_num_rows($all_post_run);
                    $total_page = ceil($all_post / $total_num_page);
                    $page_start_from = ($page_id - 1) * $total_num_page;
                    }

               ?>

这是分页代码

<ul class="pagination">
        <?php
        $search_str = '';
        if ($search) {
            $search_str = "&search=" . urlencode($search);
        }
        for ($i = 1; $i <= $total_page; $i++)
            echo "<li class='" . ($page_id == $i ? 'active' : '') . "'><a href='index.php?page=" . $i . $search_str . "'>$i</a></li>";
        ?>

    </ul>

发布时使用POST中的搜索字符串，单击页面链接时使用GET。如果不是，则使用空字符串

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

这里我们在查询中使用该关键字

建议：将查询更改为使用COUNT（*）来查找总记录，而不是使用num_行

    if ( $search ) {

        $all_post_query = "select * from files where recieved_by like '%" . $search . "%' or processed_by like  '%" . $search . "%' or   purpose like  '%" . $search . "%' or file_name like  '%" . $search . "%' order by date desc";
        $all_post_run = mysqli_query($con, $all_post_query);
        $all_post = mysqli_num_rows($all_post_run);
        $total_page = ceil($all_post / $total_num_page);
        $page_start_from = ($page_id - 1) * $total_num_page;
    } else {
        $all_post_query = "select * from files order by date desc";
        $all_post_run = mysqli_query($con, $all_post_query);
        $all_post = mysqli_num_rows($all_post_run);
        $total_page = ceil($all_post / $total_num_page);
        $page_start_from = ($page_id - 1) * $total_num_page;
    }

也在这里

<?php
if ( $search ) {
    $p_query = "select * from files where recieved_by like '%$search%' or processed_by like  '%$search%' or   purpose like  '%$search%' or file_name like '%$search%' order by date desc limit $page_start_from, $total_num_page";
} else {

    $p_query = "select * from files order by date desc limit $page_start_from, $total_num_page";
}

我建议您保留url中的页码作为参数，而不是会话。请检查会话是否未设置。使用isset（session['key']）函数。@VimukthiGuruge，请告诉我在单击任何其他链接时在何处放置unset，以便它应该离开搜索会话或何时刷新it@tan先生，告诉我如何使用它，在哪里？@tan，现在代码运行正确，在表中搜索代码时有一个简单的错误，我删除了它，工作正常，非常感谢，先生，一切正常，但它仍然显示总页数，如果没有匹配，我看不到任何显示总“页数”的内容（我可以看到锚1、2、3…等的代码），我不明白“没有匹配”是什么意思。在搜索栏中，当我搜索键时，它仍然会使整个页面没有页面，表中是否有匹配项。例如：如果表中有100条记录，每页10条，则会看到10个分页链接，即使您的搜索关键字也只匹配20条记录。在这种情况下，您只能看到2个分页链接。这就是你的意思吗？对不起，我不小心错过了你查询中的一个$_会话['search']。请将其替换为$search。编辑了我的答案。
<?php
if ( $search ) {
    $p_query = "select * from files where recieved_by like '%$search%' or processed_by like  '%$search%' or   purpose like  '%$search%' or file_name like '%$search%' order by date desc limit $page_start_from, $total_num_page";
} else {

    $p_query = "select * from files order by date desc limit $page_start_from, $total_num_page";
}

<ul class="pagination">
            <?php
            $search_str = '';
            if ($search) {
                $search_str = "&search=" . urlencode($search);
            }
            for ($i = 1; $i <= $total_page; $i++)
                echo "<li class='" . ($page_id == $i ? 'active' : '') . "'><a href='index.php?page=" . $i . $search_str . "'>$i</a></li>";
            ?>

</ul>