我在我的网站上创建了一个评论功能。我想给它添加一个回复功能，但我不知道该怎么做。
我可以发表评论并在网站上检索它们。
我想做一个回复功能，它使用它的“ parent ”ID 显示在它下面。
Desired output:
- First Comment
- First reply
- Second reply
- Second Comment
- First reply
- Second reply
我的程序是这样的:
<html>
<form action="" method ="POST">
Namn: <br>
<input type="text" name ="name"><br>
Kommentar: <br>
<textarea name="comment" rows="10" cols="20"> </textarea><br>
<input type ="submit" name ="submit" value="Skicka">
</form>
</html>
连接数据库
<?php
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
$dbname = 'com';
$connect = mysqli_connect($dbhost, $dbuser, $dbpass, $dbname) or die(mysqli_error($connect));
?>
getComments
<?php
include ('connectDB.php');
if($connect){
mysqli_select_db($connect, "comments");
$query2 = "SELECT * FROM data ORDER BY `id` DESC";
$result = mysqli_query($connect, $query2);
$comments = array();
while($row = mysqli_fetch_array($result)){
$name = $row['Name'];
$comment = $row['Comment'];
$date = $row['Date'];
echo "
<div style='width:60%' class='col-lg-12'>
<div class='panel panel-default'>
<div class='panel-heading'>
<strong> $name </strong><span style='float:right'class='text-muted'>$date</span>
</div>
<div class='panel-body'>$comment
</div>
</div><!-- /panel panel-default -->
</div><!-- /col-sm-5 -->";
}
}
?>
商店评论
<?php
if(isset($_POST['submit'])){
$name = htmlentities($_POST['name']);
$comment = htmlentities($_POST['comment']);
$date = date("Y-m-d");
$connect = mysqli_connect("localhost", "root", "");
if($connect){
mysqli_select_db($connect, "comments");
$query = "INSERT INTO data(Name, Comment, Date) VALUES (\"" . $name . "\", \"" . $comment . "\", \"" . $date . "\")";
if(mysqli_query($connect, $query)){
} else {
die ("Failed: " . mysqli_error($connect));
}
} else {
die("Failed to connect to mysql: " . mysqli_errno($connect));
}
}
}
?>
最佳答案
为防止 N+1 查询问题，当您针对每个评论进行另一个查询以查找回复时，您可以使用嵌套集模型策略，如本主题所述:php / Mysql best tree structure
查看关于 Managing Hierarchical Data in MySQL 的帖子.
[更新]
或者如果您不关心性能，您可以按照此主题解决方案:Nested comments in PHP & MySQL
关于javascript - 如何给评论添加回复功能？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40889792/