我有一个基本的PHP表单（一些字段和两个复选框，我想稍后添加更多复选框，但现在我只是使用2进行测试）在PHP中。字段和复选框保存到MySQL数据库，效果很好。
我还有一个镜像原始输入表单的“编辑”表单，除了根据行ID从MySQL数据库加载字段的值，这是非常标准的。
问题是，目前，编辑表单的最后一个字段只是另一个文本输入字段。我想要做的是更改复选框，根据原始表单的输入选中或取消选中复选框。
我认为有必要使用ischecked，但我不确定是否需要更改原始表单的逻辑，或者我是否需要更改数据库本身（我希望不会！）
数据库如此布局：
-------------------------------------------------------------------------------------------
| ID (int) | ARTICLEAUTHOR (varchar) | ARTICLEORGANIZATION (varchar) | ARTICLETAGS (varchar)|
-------------------------------------------------------------------------------------------
这两种表格的代码如下。
首先，新的参赛表格：
// addnew.php
<?php
function renderForm($articletitle, $articleorganization, $articledate, $articleurl, $articletags )
. . .
</head>
<body>
. . .
<form id="form" name="form" action="" method="post">
<h1>Create a new entry in the database</h1>
<table width="100%" border="0" cellpadding="6">
<tr>
<td colspan="2"><legend>Article details</legend></td>
</tr>
<tr>
<td width="20%" align="right"><span class="field">Article Title:</span></td>
<td width="80%" align="left"><span class="field">
<input name="articletitle" type="text" value="<?php echo $articletitle; ?>" size="50"/>
</span></td>
</tr>
<tr>
<td align="right"><span class="field">Article Author:</span></td>
<td align="left"><span class="field">
<input name="articleorganization" type="text" value="<?php echo $articleorganization; ?>" size="50"/>
</span></td>
</tr>
<tr>
<td align="right"><span class="field">Article Date:</span></td>
<td align="left"><span class="field">
<input name="articledate" type="text" value="<?php echo $articledate; ?>" size="50"/>
</span></td>
</tr>
<tr>
<td align="right"><span class="field">Article URL:</span></td>
<td align="left"><span class="field">
<input name="articleurl" type="text" value="<?php echo $articleurl; ?>" size="50"/>
</span></td>
</tr>
</table>
. . .
<input type="checkbox" name="articletags[]" value="checkbox" id="articletags_0" />
<input type="checkbox" name="articletags[]" value="checkbox 2" id="articletags_1" />
</div>
</fieldset>
<footer><input type="submit" name="submit" value="Add this Article"></footer>
. . .
</form>
</div>
</div>
. . .
</body>
</html>
<?php
}
// connect to the database
include('settings.php');
if(count($articletags) > 0)
{
$articletags_string = implode(",", $articletags);
}
// check if the form has been submitted. If it has, start to process the form and save it to the database
if($_SERVER['REQUEST_METHOD'] == 'POST')
{
// get form data, making sure it is valid
$articletitle = mysql_real_escape_string(htmlspecialchars($_POST['articletitle']));
$articleorganization = mysql_real_escape_string(htmlspecialchars($_POST['articleorganization']));
$articledate = mysql_real_escape_string(htmlspecialchars($_POST['articledate']));
$articleurl = mysql_real_escape_string(htmlspecialchars($_POST['articleurl']));
$articletags = implode(',', $_POST['articletags']);
. . .
mysql_query("INSERT articles SET articletitle='$articletitle', articleorganization='$articleorganization', articledate='$articledate', articleurl='$articleurl', articletags='$articletags' ")
or die(mysql_error());
// once saved, redirect to success page
header("Location:addsuccess.php");
}
}
else
// if the form hasn't been submitted, display the form
{
renderForm('','','','');
}
?>
现在编辑表格：
<?php
. . .
function renderForm($id, $articletitle, $articleorganization, $articledate, $articleurl, $articletags)
{
?>
. . .
<div class="content">
<div id="stylized" class="myform">
<form id="form" name="form" action="" method="post">
<input type="hidden" name="id" value="<?php echo $id; ?>"/>
<h1>Edit Details for <?php echo $articletitle; ?></h1>
<table width="100%" border="0" cellpadding="6">
<tr align="center" valign="middle">
<td colspan="2"><legend>Article details</legend></td>
</tr>
<tr>
<td width="26%" align="right"><span class="field">Article Title</span></td>
<td width="74%" align="left"><span class="field">
<input name="articletitle" type="text" value="<?php echo $articletitle; ?>" size="50"/>
</span></td>
</tr>
<tr>
<td align="right"><span class="field">Article Author</span></td>
<td align="left"><span class="field">
<input name="articleorganization" type="text" value="<?php echo $articleorganization; ?>" size="50"/>
</span></td>
</tr>
<tr>
<td align="right"><span class="field">Article Date</span></td>
<td align="left"><span class="field">
<input name="articledate" type="text" value="<?php echo $articledate; ?>" size="50"/>
</span></td>
</tr>
<tr>
<td align="right"><span class="field">Article Url:</span></td>
<td align="left"><span class="field">
<input name="articleurl" type="text" value="<?php echo $articleurl; ?>" size="50"/>
</span></td>
</tr>
<tr>
<td align="right"><span class="field">Article Tags:</span></td>
<td align="left"><span class="field">
<input name="articletags" type="text" value="<?php echo $articletags; ?>" size="50"/>
</span></td>
</tr>
<tr align="center" valign="middle">
<td colspan="2"><input type="submit" name="submit" value="Submit" /></td>
</tr>
</table>
. . .
</fieldset>
<footer></footer></form>
</div>
</div>
<div class="footer">
. . .
<!-- end .footer --></div>
</body>
</html>
<?php
}
// connect to the database
include('settings.php');
// check if the form has been submitted. If it has, process the form and save it to the database
if (isset($_POST['submit']))
{
// confirm that the 'id' value is a valid integer before getting the form data
if (is_numeric($_POST['id']))
{
// get form data, making sure it is valid
$id = $_POST['id'];
$articletitle = mysql_real_escape_string(htmlspecialchars($_POST['articletitle']));
$articleorganization = mysql_real_escape_string(htmlspecialchars($_POST['articleorganization']));
$articledate = mysql_real_escape_string(htmlspecialchars($_POST['articledate']));
$articleurl = mysql_real_escape_string(htmlspecialchars($_POST['articleurl']));
$articletags = mysql_real_escape_string(htmlspecialchars($_POST['articletags']));
. . .
mysql_query("UPDATE articles SET articletitle='$articletitle', articleorganization='$articleorganization', articledate='$articledate', articleurl='$articleurl', articletags='$articletags' WHERE id=$id")
or die(mysql_error());
. . .
{
// get the 'id' value from the URL (if it exists), making sure that it is valid (checing that it is numeric/larger than 0)
if (isset($_GET['id']) && is_numeric($_GET['id']) && $_GET['id'] > 0)
{
// query db
$id = $_GET['id'];
$result = mysql_query("SELECT * FROM articles WHERE id=$id")
or die(mysql_error());
$row = mysql_fetch_array($result);
// check that the 'id' matches up with a row in the databse
if($row)
{
// get data from db
$articletitle = $row['articletitle'];
$articleorganization = $row['articleorganization'];
$articledate = $row['articledate'];
$articleurl = $row['articleurl'];
$articletags = $row['articletags'];
// show form
renderForm($id, $articletitle, $articleorganization, $articledate, $articleurl, $articletags, '');
}
. . .
?>
答案 0 :(得分：1)
最好有两个新表来跟踪标签。
您的文章表将丢失标记字段
使用以下结构标记表：
Tags Table
-----
id (int)
tagname varchar(64)
ArticleHasTags具有以下结构的交叉映射表
ArticleHasTags
----
article_id (int)
tag_id (int)
然后根据标签表条目构建复选框。存储文章时，您还将根据条目表单中的复选框向ArticleHasTags表添加条目。
显示编辑表单时，您可以从Article表和ArticleHasTags表中提取数据，可以使用多个连接，也可以更容易进行第二次选择：
select * from ArticleHasTags where article_id = $id
（其中$ id是您正在编辑的文章的ID）
然后再次从Tags数据库中提取所有行以显示您的复选框。当您显示每个复选框时，您可以通过使用in_array（）检查检索到的ArticleHasTag结果的标记ID来检查文章何时具有该标记。
我可以深入研究，但是我会判断，从长远来看，使用这些指针并自己计算细节对你来说更有价值;）
这一切都非常程序化，但没有光顾，这看起来就像你现有代码所处的水平。鼓励并继续学习！你来对了。