我试图根据复选框从表中删除多行，但是我不太清楚如何最好地去做。目前，我有一个电影列表，我希望能够删除这些电影中的一个或多个，具体取决于它们是否被选中。
// Update Watchlist
if ($submit == 'Update Watchlist') {
require_once("db_connect.php");
$watchlist_name = clean_string($_POST['watchlist-name']);
$watchlist_description = clean_string($_POST['watchlist-description']);
$watchlist_category = $_POST['watchlist-category'];
$updateWatchlist_bad_message = '';
if (!empty($watchlist_name)) {
if ($watchlist_name = clean_string($watchlist_name)) {
$update_watchlist_name_query = "UPDATE watchlists SET name = '$watchlist_name' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_name_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_name_query);
}
}
if (!empty($watchlist_description)) {
if ($watchlist_description = clean_string($watchlist_description)) {
$update_watchlist_description_query = "UPDATE watchlists SET description = '$watchlist_description' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_description_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_description_query);
}
}
if ($watchlist_category != "") {
$update_watchlist_category_query = "UPDATE watchlists SET category = '$watchlist_category' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_category_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_category_query);
}
if(isset($_POST['film-name'])) {
$checkbox = $_POST['film-name'];
$count = count($checkbox);
for($i = 0; $i < $count; $i++) {
$id = (int) $checkbox[$i]; // Parse your value to integer
if ($id > 0) { // and check if it's bigger then 0
mysql_query("DELETE FROM watchlist_films WHERE film_id = $rt_id");
}
}
} else {
$updateWatchlist_bad_message = '<div class="alert alert-error">Sorry, but we can\'t do that at the minute. Please try again later.</div>';
}
require_once("db_close.php");?>
<script type="text/javascript">
window.location = "watchlist.php?id=<?php echo $watchlist_id; ?>"
</script><?php
}
相应的字符串是电影名称，我试图使用此解决方案 - PHP to delete SQL row with multiple checkboxes - 但是它不起作用，因为电影没有从其包含的关注列表中删除。
基本上，我的查询背后的逻辑如下：
我不确定上述是否是最简单的方法，例如，只检查是否有任何复选框被勾选，而不是首先检查是否有任何一个复选框可能更简单，更清晰在检查是否有其他人之前勾选。
更新
以为我会用更多信息澄清 - 我的实际foreach显示了关注列表中的所有电影，下面是（格式化道歉）：
foreach ($films as $key => $film_item) {
include ("watchlist-film-controller.php");?>
<label class="checkbox input-block-level">
<p class="pull-right"><?php echo $title; ?></p>
<input type="checkbox" class="input-block-level" name="film-name[]"
value="<?php echo $title; ?>">
</label><?php
}
更新2
在回答这篇文章的两篇（感谢收到！）评论时，这里有关于现在发生了什么的更多信息。我尝试了两种解决方案，但两种方法都没有。按照目前的情况，我已经实现了didierc给出的解决方案，我的代码目前看起来像这样：
<?php
/*
ini_set('display_errors', 1);
error_reporting(E_ALL);
*/
$rt_id = $film_item['film_id'];
$watchlist_id = $_GET['id'];
include_once('/api/RottenTomatoes.php');
$rottenTomatoes = new RottenTomatoes('2b2cqfxyazbbmj55bq4uhebs', 10, 'us');
/* echo "<pre>"; */
try {
$result = $rottenTomatoes->getMovieInfo($rt_id);
//print_r($result);
} catch (Exception $e) {
//print_r($e);
}
/* echo "</pre>"; */
$title = $result['title'];
$year = $result['year'];
$critics_consensus = $result['critics_consensus'];
$poster_thumb = $result['posters']['thumbnail'];
// Update Watchlist
if ($submit == 'Update Watchlist') {
require_once("db_connect.php");
$watchlist_name = clean_string($_POST['watchlist-name']);
$watchlist_description = clean_string($_POST['watchlist-description']);
$watchlist_category = $_POST['watchlist-category'];
$updateWatchlist_bad_message = '';
if (!empty($watchlist_name)) {
if ($watchlist_name = clean_string($watchlist_name)) {
$update_watchlist_name_query = "UPDATE watchlists SET name = '$watchlist_name' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_name_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_name_query);
}
}
if (!empty($watchlist_description)) {
if ($watchlist_description = clean_string($watchlist_description)) {
$update_watchlist_description_query = "UPDATE watchlists SET description = '$watchlist_description' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_description_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_description_query);
}
}
if ($watchlist_category != "") {
$update_watchlist_category_query = "UPDATE watchlists SET category = '$watchlist_category' WHERE watchlist_id = " . $watchlist_id;
mysql_query($update_watchlist_category_query) or die("Insert failed. " . mysql_error() . "<br />" . $$update_watchlist_category_query);
}
if(isset($_POST['film-name'])) {
$films = array_map('intval', $_POST['film-name']); // make sure that every film id is an integer
mysql_query("DELETE FROM watchlist_films WHERE film_id IN (" . implode(',', $films) . ") AND watchlist_id = " . $watchlist_id);
} else {
$updateWatchlist_bad_message = '<div class="alert alert-error">Sorry, but we can\'t do that at the minute. Please try again later.</div>';
}
require_once("db_close.php");?>
<script type="text/javascript">
window.location = "watchlist.php?id=<?php echo $watchlist_id; ?>"
</script><?php
}
$rt_id是每个电影的唯一ID，并且正在传递给表单，因此查询知道应该删除哪些电影或电影。电影的名称仅用于使实际删除表格更易于阅读，而不是打印出ID号列表，因为用户无法知道哪个ID匹配哪部电影。在尝试了两个解决方案后，似乎都没有工作，但是没有返回任何错误 - 表单提交，但所选的电影不会从监视列表中删除。
更新3
在回应didierc的评论时，以下是对所发生情况的全面细分：
watchlists和watchlist_films。 watchlists包含简单信息，例如监视列表ID，名称和描述，以及创建它的用户的用户ID。 watchlist_films仅包含监视列表ID和监视列表包含的电影ID（$rt_id）。监视列表占用watchlists表中的单行和watchlist_films表中的多行（因为一个监视列表可以有多个影片）。$rt_id）的来源 - 每部电影都有一个完全独特的$rt_id。观察列表的完整“处理代码”位于 Update 2 中，但HTML呈现如下：
<?php
include("checklog.php");
require_once("watchlist-controller.php");
?>
<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="shortcut icon" href="img/fav.ico">
<link rel="apple-touch-icon" href="img/apple-touch-icon.png">
<title>Screening - Your ticket to your movies - <?php echo $watchlist_name; ?></title>
<meta name="description" content="Screening is a brand new take on the traditional movie database, fusing social networking and multimedia to provide a clear, concise experience allowing you to share your favourite movies, and discover new classics.">
<meta name="keywords" content="Movies, Films, Screening, Discover, Watch, Share, experience, database, movie database, film database, share film, share films, discover film, discover films, share movie, share movies, discover movie, discover movies">
<!-- Bootstrap -->
<link href="css/bootstrap.css" rel="stylesheet" media="screen">
<link href="css/bootstrap-responsive.css" rel="stylesheet">
<link href="css/custom-bootstrap.css" rel="stylesheet">
<link rel="stylesheet" href="fonts.css" type="text/css" />
<link rel="stylesheet/less" type="text/css" href="css/stylesheet.less" />
<script src="js/less-1.3.3.min.js" type="text/javascript"></script>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<!-- Start Google Analytics -->
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-36943512-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
<!-- End Google Analytics -->
<!-- Start Google Analytics -->
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-36943512-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
<!-- End Google Analytics -->
</head>
<body>
<div class="container"><?php
require_once ("header.php");?>
<div class="well main-content">
<p class="page-title"><?php echo $watchlist_name; ?></p>
<div class="row-fluid">
<section class="span3 sidebar pull-left">
<p class="sidebar-text"><span class="bold">NAME: </span><?php echo $watchlist_name; ?></p>
<p class="sidebar-text"><span class="bold">CATEGORY: </span><?php echo $watchlist_category; ?></p>
<div class="alert alert-info"><?php echo $watchlist_description; ?></div>
<a href="#watchlistUpdate" class="btn btn-primary btn-block" data-toggle="modal" title="Update Watchlist">Update Watchlist</a>
<a href="#watchlistDelete" class="btn btn-danger btn-block" data-toggle="modal" title="Delete Watchlist">Delete Watchlist</a>
<a href="profile.php" class="btn btn-block" title="Logout">Your Profile</a>
</section>
<section class="span9 watchlist-holder">
<!-- Loading bar -->
<!--
<div class="progress progress-striped active">
<div class="bar" style="width: 100%;"></div>
</div>
-->
<ul class="unstyled"><?php
foreach($films as $key => $film_item) {
include ("watchlist-film-controller.php");?>
<li class="well list-item clearfix">
<div class="row-fluid">
<a href="movie.php?id=<?php echo $rt_id; ?>" class="span1 pull-left" title="<?php echo $title; ?>"><img src="<?php echo $poster_thumb; ?>" alt="<?php echo $title; ?> poster" title="<?php echo $title; ?> poster" /></a>
<div class="span11 movie-info">
<p class="search-title"><a href="movie.php?id=<?php echo $film_item['film_id']; ?>" title="<?php echo $title; ?> (<?php echo $year; ?>)"><?php echo $title; ?></a> <small>(<?php echo $year; ?>)</small></p><?php
if ($critics_consensus == "") {?>
<p class="watchlist-synopsis">No overview available</p><?php
} else {?>
<p class="watchlist-synopsis"><?php echo $critics_consensus; ?></p><?php
}?>
</div>
</div>
</li><?php
}?>
</ul>
</section>
<div id="watchlistUpdate" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="watchlistUpdateLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h3 id="watchlistUpdateLabel" class="modal-title">Update Watchlist</h3>
</div>
<form name="watchlist-updater" class="watchlist-updater" action="watchlist.php?id=<?php echo $watchlist_id; ?>" method='POST'>
<div class="modal-body">
<?php echo $updateWatchlist_bad_message; ?>
<div class="alert alert-info">Use the boxes below to change the Watchlist name and description</div>
<input type="text" class="input-block-level" name="watchlist-name" alt="watchlist-name" placeholder="<?php echo $watchlist_name; ?>">
<textarea rows="3" class="input-block-level" name="watchlist-description" title="Watchlist Description" placeholder="<?php echo $watchlist_description; ?>"></textarea>
<label for="Watchlist Category" class="pull-left inline-label" title="Watchlist Category">Watchlist Category</label>
<select class="input-block-level" name="watchlist-category" title="Watchlist Category">
<option value="" title=""></option>
<option value="General" title="General">General</option>
<option value="To watch" title="To watch">To watch</option>
<option value="To share" title="To share">To share</option>
<option value="Favourites" title="Favourites">Favourites</option>
</select>
<div class="alert alert-info">Use the checkbox to the left of each film to remove it from the Watchlist</div><?php
foreach ($films as $key => $film_item) {
include ("watchlist-film-controller.php");?>
<label class="checkbox input-block-level">
<p class="pull-right"><?php echo $title; ?></p>
<input type="checkbox" class="input-block-level" name="film-name" value="<?php echo $title; ?>">
</label><?php
}?>
</div>
<div class="modal-footer">
<button type="button" class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
<button type="submit" class="btn btn-success" name="submit" value="Update Watchlist">Update Watchlist</button>
</div>
</form>
</div>
<div id="watchlistDelete" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="watchlistDeleteLabel" aria-hidden="true">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h3 id="watchlistDeleteLabel" class="modal-title">Delete Watchlist</h3>
</div>
<div class="modal-body">
<?php echo $deleteWatchlist_bad_message; ?>
<div class="alert alert-error alert-block">
<p>Deleting this Watchlist will delete all its containing films from your profile. This information will not be recoverable.</p>
<p>Please only delete this Watchlist if you are absolutely sure you want to purge all the information it contains.</p>
</div>
<p>Are you sure you want to delete this Watchlist?</p>
</div>
<div class="modal-footer">
<form name="watchlist-delete" class="watchlist-delete" action="watchlist.php?id=<?php echo $watchlist_id; ?>" method="POST"><?php
include ("watchlist-film-controller.php");?>
<button type="button" class="btn" data-dismiss="modal" aria-hidden="true">Do not delete this Watchlist</button>
<button type="submit" class="btn btn-danger" name="submit" value="Delete Watchlist">Delete Watchlist</button>
</form>
</div>
</div>
</div>
</div>
<?php include 'footer.html'; ?>
</div>
</body>
</html>
Watchlist的实际更新位于#updateWatchlist模式中。我需要提供更多信息，我很乐意提供！
答案 0 :(得分：1)
我认为（问题之一）（问题之一）是您要$rt_id删除。但是，在之前的行中，它只被称为id。除此之外，我现在无法看到任何明显的问题。如果这不起作用，请尝试将mysql_query替换为echo并将输出发送到数据库时打印SQL查询。
另外，快速提示：现在，您正在逐个删除电影。根据所选电影的数量，这可能是一个明显的性能影响。如何在一个查询中删除它们？
if(isset($_POST['film-name'])) {
$films = array_map('intval', $_POST['film-name']); // make sure that every film id is an integer
mysql_query("DELETE FROM watchlist_films WHERE film_id IN (" . implode(',', $films) . ")");
}
答案 1 :(得分：1)
有些奇怪的事情：
在您的删除循环中，您从$id检查了$checkbox，但是您使用$rt_id：我认为这就是它无效的原因。
对于关注列表描述，您可以在其上调用clean_string两次，一次从$_POST获取，另一次检查是否为空。
复选框值实际上是电影标题，而不是电影ID，您应该修复它，或者在表单处理脚本中检索相应的ID。
您删除了具有给定电影ID的所有条目，但它应该只是与特定监视列表绑定的条目。
关于删除过程，您可以将其整合为一个查询：
$range = implode(',', array_filter(
array_map('intval', $checkbox),
function($v){ return $v > 0; }));
$update_query = 'DELETE FROM watchlist_films WHERE film_id IN ('.$range.") AND watchlist_id = '" . $watchlist_id."'";
根据您的意见，让我详细说明：
$title，我想您在watchlist-film-controller.php中计算，因为它不会出现在其他地方。但是，删除表中行所需的值为$
rt_id。如何根据$rt_id计算$title？ 基本上，您的复选框value 应该 $rt_id，这样在表单处理中，您不必再次查找该值。我很确定，对于给定的电影标题，您可能会获得多个电影ID，因此您不能仅仅依靠标题来删除关注列表中的条目。想象一下，有人在她的监视列表中有所有名为“True Grit”的电影，如果她选择删除其中一个，你会怎么处理呢？
请考虑将来将代码移动到PDO或mysqli API，以实现更安全的数据清理。