我尝试开发一个评论系统。 foreach row $ result包含名为posts的数据库中的变量。对于评论，功能是弹出窗口。作为AUTO_INCREMENT的帖子的id，帖子的作者和评论被提交到一个文件，该文件将三个值插入名为comments的数据库中。当用户单击弹出按钮时，第二个foreach循环$ comments应显示注释。这不起作用，因为ID <input type="hidden" name="id" id="id" value="<?PHP echo $row['id']; ?>" type="text" />不是唯一的，并且每个列表项的注释都显示不正确，但帖子具有唯一的ID。所有评论都显示出来。如何更改每个新创建的列表项中唯一ID？
<div data-role="content">
<?php include( "list.php"); ?>
<div data-demo-html="true">
<ul data-role="listview" data-inset="true" class="ui-listview ui-listview-inset ui-corner-all ui-shadow">
<?php foreach ($result as $key=> $row): ?>
<li id="listone" name="listone" data-role="list-divider" role="heading" class="ui-li ui-li-divider ui-bar-b ui-li-has-count ui-first-child">
<?php echo $row[ 'date']; ?>
</li>
<li data-corners="false" data-shadow="false" data-iconshadow="true" data-wrapperels="div" data-icon="arrow-r" data-iconpos="right" data-theme="a">
<div class="ui-btn-inner ui-li">
<div class="ui-btn-text">
<a class="ui-link-inherit">
<p class="ui-li-aside ui-li-desc"><strong></strong>
<?php echo $row[ 'time']; ?>
</p>
<p class="ui-li-desc"><strong><?php echo $row['title']; ?></strong>
</p>
<p class="ui-li-desc">
<?php echo $row[ 'text']; ?>
</p>
<p class="ui-li-desc"><strong><?php echo $row['town']; ?></strong>
</p>
<a href="#popupcomment" data-rel="popup" data-position-to="window" data-transition="pop">comment</a>
<div data-role="popup" id="popupcomment" data-theme="a" class="ui-corner-all">
<form data-ajax="false" name="login-form" class="login-form" action="./comments.php" method="post" style="padding:20px 40px;">
<div class="content">
<?php include( "showcomments.php"); ?>
<?php foreach ($comments as $keyComment=> $rowComment): ?>
<p class="ui-li-desc"><strong><?php echo $rowComment['username']; ?></strong>
</p>
<p class="ui-li-desc">
<?php echo $rowComment[ 'comment']; ?>
</p>
<?php endforeach; ?>
<input type="hidden" name="id" id="id" value="<?php echo $row['id']; ?>" type="text" />
<input type="hidden" name="autorpost" id="autorpost" value="<?php echo $row['autor']; ?>" type="text" />
<!-- autor des posts -->
<textarea rows="1" name="text" id="text" class="foo"></textarea>
</div>
<div class="footer">
<input type="submit" name="save" value="comment" class="button" data-theme="a" />
</div>
</form>
</div>
</a>
</li>
<?php endforeach; ?>
</ul>
</div>
</div>
<!-- div content -->
</div>
</div>
showcomments.php：
$hostname='localhost';
$user='root';
$password='';
$id = $row['id'];
try {
$dbh = new PDO("mysql:host=$hostname;dbname=searchfood",$user,$password);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // <== add this line
$sql = "SELECT id, username, comment, time
FROM comments
WHERE id_post = $id
ORDER BY id DESC"; // oder (longitude between $loo and $lo or latitude between $laa and $la) versuchen
if ($com = $dbh->query($sql)) {// need to add this line in your code
// then after fetchColumn
$comments = $com->fetchAll();
}
}
catch(PDOException $e)
{
echo $e->getMessage();
}
的comments.php：
$hostname='localhost';
$user='root';
$password='';
if(isset($_POST["id"])){
try {
$dbh = new PDO("mysql:host=localhost;dbname=searchfood", $user, $password);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // <== add this line
// prepare your query
$query = 'INSERT INTO comments (username, autorpost, comment, id_post, time) VALUES (?, ?, ?, ?, now())';
$stmt = $dbh->prepare($query);
// bind variables
$stmt->execute(array($_COOKIE['username'], $_POST['autorpost'], $_POST['text'], $_POST['id']));
// pull last insert id
$new = $dbh->lastInsertId();
// show success message or redirect, whatever you want
echo "New Record Inserted Successfully";
$message['success'] = 'Neuer Benutzer (' . htmlspecialchars($_POST['username']) . ') wurde angelegt, <a href="login.php">weiter zur Anmeldung</a>.';
header("Location: http://".$_SERVER['HTTP_HOST']."/lendsth/main.php", true, 302);
}
catch(PDOException $e)
{
echo $e->getMessage();
}
}
答案 0 :(得分：0)
尝试以下代码，
创建一个名为$i;
每次迭代，然后添加 id 。
<div data-role="content">
<?php include( "list.php"); ?>
<div data-demo-html="true">
<ul data-role="listview" data-inset="true" class="ui-listview ui-listview-inset ui-corner-all ui-shadow">
<?php $i = 0; ?>
<?php foreach ($result as $key=> $row): ?>
<li id="listone" name="listone" data-role="list-divider" role="heading" class="ui-li ui-li-divider ui-bar-b ui-li-has-count ui-first-child"> <?php echo $row[ 'date']; ?> </li>
<li data-corners="false" data-shadow="false" data-iconshadow="true" data-wrapperels="div" data-icon="arrow-r" data-iconpos="right" data-theme="a">
<div class="ui-btn-inner ui-li">
<div class="ui-btn-text">
<a class="ui-link-inherit">
<p class="ui-li-aside ui-li-desc"><strong></strong> <?php echo $row[ 'time']; ?> </p>
<p class="ui-li-desc"><strong><?php echo $row['title']; ?></strong> </p>
<p class="ui-li-desc"> <?php echo $row[ 'text']; ?> </p>
<p class="ui-li-desc"><strong><?php echo $row['town']; ?></strong> </p>
<a href="#popupcomment" data-rel="popup" data-position-to="window" data-transition="pop">comment</a>
<div data-role="popup" id="popupcomment" data-theme="a" class="ui-corner-all">
<form data-ajax="false" name="login-form" class="login-form" action="./comments.php" method="post" style="padding:20px 40px;">
<div class="content">
<?php include( "showcomments.php"); ?>
<?php foreach ($comments as $keyComment=> $rowComment): ?>
<p class="ui-li-desc"><strong><?php echo $rowComment['username']; ?></strong> </p>
<p class="ui-li-desc"> <?php echo $rowComment[ 'comment']; ?> </p>
<?php endforeach; ?>
<input type="hidden" name="id" id="id<?php echo $i; ?>" value="<?php echo $row['id']; ?>" type="text" />
<input type="hidden" name="autorpost" id="autorpost" value="<?php echo $row['autor']; ?>" type="text" />
<!-- autor des posts -->
<textarea rows="1" name="text" id="text" class="foo"></textarea>
</div>
<div class="footer">
<input type="submit" name="save" value="comment" class="button" data-theme="a" />
</div>
</form>
</div>
</a> </li>
<?php $i++; ?>
<?php endforeach; ?>
</ul>
</div>
</div>
<!-- div content -->
</div>
</div>