【发布时间】：2019-08-03 14:08:36
【问题描述】：
我正在创建一个包含不同电影的网站，每部电影都有一个特定的 id_movie，我添加了一个评论框，用户可以在其中添加关于电影的评论，但是，我点击的每部电影都显示相同已输入的 cmets，我希望每部电影都有自己的 cmets，如果您能帮助我，我会很高兴。谢谢
cmets.php
<body>
<br />
<h2 align="center"><p >Add Comment</p></h2>
<br />
<div class="container">
<form method="POST" id="comment_form">
<div class="form-group">
<input type="text" name="comment_name" id="comment_name" class="form-control" placeholder="Enter Name" />
</div>
<div class="form-group">
<textarea name="comment_content" id="comment_content" class="form-control" placeholder="Enter Comment" rows="5"></textarea>
</div>
<div class="form-group">
<input type="hidden" name="comment_id" id="comment_id" value="0" />
<input type="submit" name="submit" id="submit" class="btn btn-info" value="Submit" />
</div>
</form>
<span id="comment_message"></span>
<br />
<div id="display_comment"></div>
</div>
</body>
<script>
$(document).ready(function(){
$('#comment_form').on('submit', function(event){
event.preventDefault();
var form_data = $(this).serialize();
$.ajax({
url:"add_comment.php",
method:"POST",
data:form_data,
dataType:"JSON",
success:function(data)
{
if(data.error != '')
{
$('#comment_form')[0].reset();
$('#comment_message').html(data.error);
$('#comment_id').val('0');
load_comment();
}
}
})
});
load_comment();
function load_comment()
{
$.ajax({
url:"fetch_comment.php",
method:"POST",
success:function(data)
{
$('#display_comment').html(data);
}
})
}
$(document).on('click', '.reply', function(){
var comment_id = $(this).attr("id");
$('#comment_id').val(comment_id);
$('#comment_name').focus();
});
});
</script>
add_comment.php
<?php
$con = new PDO('mysql:host=localhost;dbname=db_movie', 'root', '');
$error = '';
$comment_name = '';
$comment_content = '';
if(empty($_POST["comment_name"]))
{
$error .= '<p class="text-danger">Name is required</p>';
}
else
{
$comment_name = $_POST["comment_name"];
}
if(empty($_POST["comment_content"]))
{
$error .= '<p class="text-danger">Comment is required</p>';
}
else
{
$comment_content = $_POST["comment_content"];
}
if($error == '')
{
$query = "
INSERT INTO tbl_comment
(parent_comment_id, comment, comment_sender_name, movie_id)
VALUES (:parent_comment_id, :comment, :comment_sender_name)
";
$statement = $con->prepare($query);
$statement->execute(
array(
':parent_comment_id' => $_POST["comment_id"],
':comment' => $comment_content,
':comment_sender_name' => $comment_name
)
);
$error = '<label class="text-success">Comment Added</label>';
}
$data = array(
'error' => $error
);
echo json_encode($data);
?>
fetch_comment.php
<?php
//fetch_comment.php
$con = new PDO('mysql:host=localhost;dbname=db_movie', 'root', '');
$query = "
SELECT * FROM tbl_comment
WHERE parent_comment_id = '0'
ORDER BY comment_id DESC
";
$statement = $con->prepare($query);
$statement->execute();
$result = $statement->fetchAll();
$output = '';
foreach($result as $row)
{
$output .= '
<div class="panel panel-default">
<div class="panel-heading">By <b>'.$row["comment_sender_name"].'</b> on <i>'.$row["date"].'</i></div>
<div class="panel-body">'.$row["comment"].'</div>
<div class="panel-footer" align="right"><button type="button" class="btn btn-default reply" id="'.$row["comment_id"].'">Reply</button></div>
</div>
';
$output .= get_reply_comment($con, $row["comment_id"]);
}
echo $output;
function get_reply_comment($con, $parent_id = 0, $marginleft = 0)
{
$query = "
SELECT * FROM tbl_comment WHERE parent_comment_id = '".$parent_id."'
";
$output = '';
$statement = $con->prepare($query);
$statement->execute();
$result = $statement->fetchAll();
$count = $statement->rowCount();
if($parent_id == 0)
{
$marginleft = 0;
}
else
{
$marginleft = $marginleft + 48;
}
if($count > 0)
{
foreach($result as $row)
{
$output .= '
<div class="panel panel-default" style="margin-left:'.$marginleft.'px">
<div class="panel-heading">By <b>'.$row["comment_sender_name"].'</b> on <i>'.$row["date"].'</i></div>
<div class="panel-body">'.$row["comment"].'</div>
<div class="panel-footer" align="right"><button type="button" class="btn btn-default reply" id="'.$row["comment_id"].'">Reply</button></div>
</div>
';
$output .= get_reply_comment($con, $row["comment_id"], $marginleft);
}
}
return $output;
}
?>
当我点击每部电影时：
<?php include('header.php');
$qry2=mysqli_query($con,"select * from tbl_movie where movie_id='".$_GET['id']."'");
$movie=mysqli_fetch_array($qry2);
?>
<div class="content">
<div class="wrap">
<div class="content-top">
<div class="section group">
<div class="about span_1_of_2">
<h3><?php echo $movie['movie_name']; ?></h3>
<div class="about-top">
<div class="grid images_3_of_2">
<img src="<?php echo $movie['image']; ?>" width="180px" height="280px" alt=""/>
<?php include('ratte.php'); ?>
</div>
<div class="desc span_3_of_2">
<p class="p-link" style="font-size:15px">Type: <?php echo $movie['type']; ?></p>
<p class="p-link" style="font-size:15px">Price: £<?php echo date($movie['price']); ?></p>
<p style="font-size:15px"><?php echo $movie['desc']; ?></p>
<a href="<?php echo $movie['video_url']; ?>" target="_blank" class="watch_but">Watch Trailer</a>
</div>
<div class="clear"></div>
</div>
<?php $s=mysqli_query($con,"select DISTINCT theatre_id from tbl_shows where movie_id='".$movie['movie_id']."'");
if(mysqli_num_rows($s))
{?>
<table class="table table-hover table-bordered text-center">
<?php
while($shw=mysqli_fetch_array($s))
{
$t=mysqli_query($con,"select * from tbl_theatre where id='".$shw['theatre_id']."'");
$theatre=mysqli_fetch_array($t);
?>
<tr>
<td>
<?php echo $theatre['name'].", ".$theatre['place'];?>
</td>
<td>
<?php $tr=mysqli_query($con,"select * from tbl_shows where movie_id='".$movie['movie_id']."' and theatre_id='".$shw['theatre_id']."'");
while($shh=mysqli_fetch_array($tr))
{
$ttm=mysqli_query($con,"select * from tbl_show_time where st_id='".$shh['st_id']."'");
$ttme=mysqli_fetch_array($ttm);
?>
<a href="check_login.php?show=<?php echo $shh['s_id'];?>&movie=<?php echo $shh['movie_id'];?>&theatre=<?php echo $shw['theatre_id'];?>"><button class="btn btn-default"><?php echo date('h:i A',strtotime($ttme['start_time']));?></button></a>
<?php
}
?>
</td>
</tr>
<?php
}
?>
</table>
<div id='display_comment'></div>
<?php
}
else
{
?>
<h3>No Show Available</h3>
<div id='display_comment'></div>
<?php
}
?>
</div>
<?php include('related-movies.php');
?>
</div>
<div class="clear"></div>
</div>
<?php include('comments.php'); ?>
</div>
</div>
<?php include('footer.php'); ?>
【问题讨论】：
-
您的 INSERT 查询中缺少
movie_id。 -
在获取 cmets 的“AJAX”调用中，
$.ajax({url:"fetch_comment.php",您需要将电影 ID 传递回 PHP，然后在后端将该 ID 添加到 SQL 中以获取 cmets。SELECT * FROM tbl_comment WHERE parent_comment_id = '0' AND movie_id=? ORDER BY comment_id DESC对于 AJAX 添加dataType:"json"然后对于data:类似{movie_id : <?php echo $movie_id; ?>} -
基本上，您必须在构建页面时获取您拥有的电影 ID，并将其提供给您的调用以获取 cmets，然后它有点像掉头，然后返回到服务器你在哪里得到cmets。哦，差点忘了，在上面获取通信的函数中使用我的示例，您将使用
$_POST['movie_id']确保使用准备好的 SQL 语句以确保安全，这样人们就无法破解您的 SQL。现在是晚餐，但我可以在 30 分钟左右发布正确的答案。 -
我试过这个东西（AND movie_id=?），但它说这个错误：PDOStatement::execute(): SQLSTATE[HY093]: Invalid parameter number: no parameters in line 15
-
我在编码方面不是那么专业，我真的不知道该怎么做，如果你有想法可以请你更新我的代码，我会感谢你的帮助
标签： javascript php mysql ajax database