Question

我正在创建一个允许用户返回上一页的面板。但是，我对第二个链接有困难。

<a href='discussions.php'><?php echo $category_section; ?></a>
                <?php $back_topics; ?>
                <a></a>

$back_topics ="<a href='forum_view_category.php?cid='".$cid."'>Back to Topics</a>";

该链接框中没有显示任何内容。我做错了什么？

更新

$stmt->bind_result($topic_id, $category_id, $topic_title, $topic_creator, $topic_last_user, $topic_date, $topic_reply_date, $topic_views); 

    if (!$stmt) {
        throw new Exception($con->error);
    }
}
$stmt->store_result();
$numrows = $stmt->num_rows;

if($numrows == 1){
?>
        <div class="page_background">
            <div class="page">
                             <div class="forum_links_out">
                    <a href='discussions.php'>Discussions</a>
                    <a href='discussions.php'><?php echo $category_section; ?></a>
                    <?php
                    $back_topics ="<a href='forum_view_category.php?cid=$cid'>".$topic_title."</a>";
                     echo $back_topics; ?>
                    <a></a>
                </div>

<?php

        if ( $_SESSION['user'] ) { 
            echo "<input type='submit' class='repy_view_topic_button' value='Reply to Thread' onclick=\"window.location = 
        'forum_post_reply.php?cid=".$cid."&tid=".$tid."'\">";
        } else {
            echo "<p>Please log in to add your reply</p>";
        }
?>      
        <table class="forum_view_topic_table">
<?php
        }

        while ($row = $stmt->fetch()) {
        //added in topic title variable
?>
        <div class="view_topic_thread_name_out">
            <div class="view_topic_thread_name">Thread: <?php echo $topic_title;?></div>
        </div>

Answer 1

查看您正在生成的HTML：

$back_topics ="<a href='forum_view_category.php?cid='".$cid."'>Back to Topics</a>";
                       ^--start href value          ^--end href value

这意味着您的$cid值本身就是一个未知/无效的属性：

<a href='forum_view_category.php?cid=' 42'>
                                       ^^^---illegal/unknown attribute

你想要

$back_topics ="<a href='forum_view_category.php?cid=$cid'>Back to Topics</a>";
                                                   ^^^^^

代替。

Answer 2

原创

<a href='discussions.php'><?php echo $category_section; ?></a>
<?php $back_topics; ?>
            <a></a>
 $back_topics ="<a href='forum_view_category.php?cid='".$cid."'>Back to Topics</a>";

更改为

$back_topics ="<a href='forum_view_category.php?cid='".$cid."'>Back to Topics</a>";
<a href='discussions.php'><?php echo $category_section; ?></a>
<?php echo $back_topics; ?>

PHP中的链接不显示

2 个答案: