php PHP通过href传递变量id
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PHP passing variable id through href
提问by Rimjhim Ratnani
I want to have a link to another page, with particular subject, How can I pass the id ?
我想要一个链接到另一个页面，具有特定的主题，我如何传递 id ？
<table class="table table-hover">
<thead>
<tr>
<th>Subject</th>
<th>Add Topic</th>
</tr>
</thead>
<tbody>
<tr>
<?php foreach($subjects as $sub):?>
<td><?php echo $sub->subject;?></td>
<td><a href='approve.php?id=".$sub->id."' role="button" class="btn">Add Topic</a></td>
</tr>
<?php endforeach;?>
</tbody>
</table>
回答by xdazz
You still need to echo it out.
您仍然需要将其回显出来。
<?php foreach($subjects as $sub): ?>
<tr>
<td><?php echo $sub->subject ?></td>
<td><a href="approve.php?id=<?php echo $sub->id ?>" role="button" class="btn">Add Topic</a></td>
</tr>
<?php endforeach; ?>
回答by Kumar Saurabh Sinha
Please try the following:
请尝试以下操作：
<table class="table table-hover">
<thead>
<tr>
<th>Subject</th>
<th>Add Topic</th>
</tr>
</thead>
<tbody>
<?php foreach($subjects as $sub):?>
<tr>
<td><?php echo $sub->subject;?></td>
<td><a href='approve.php?id=<?php echo $sub->id; ?>' role="button" class="btn">Add Topic</a></td>
</tr>
<?php endforeach;?>
</tbody>
</table>
and then on the page : approve.php
然后在页面上：approve.php
<?php
$subjectId = $_GET['id'];
?>
$subjectIdwill give you the corresponding subject id with which you can move forward with the functionality.
$subjectId将为您提供相应的主题 ID，您可以使用该 ID 继续使用该功能。
Note: foreachshould start either outside <tr>and end outside </tr>or it can be inside <tr> </tr>
注意：foreach应该从外面开始并在外面<tr>结束</tr>，也可以在里面<tr> </tr>
回答by Pete
You need to enclose your variable in a PHP tag:
您需要将变量括在 PHP 标记中：
<?php foreach($subjects as $sub):?>
<tr>
<td><?php echo $sub->subject;?></td>
<td><a href='approve.php?id=<?php echo $sub->id ?>' role="button" class="btn">Add Topic</a></td>
</tr>
<?php endforeach;?>
There is also a short form echo tag enabled on most PHP servers <?= $variable ?>
大多数 PHP 服务器上还启用了一个简短的 echo 标记 <?= $variable ?>
On the subsequent page you retrieve the parameter from the GETarray:
在随后的页面上，您从GET数组中检索参数：
$subject = $_GET['id'];
If you're passing this value to the database you should do some validation:
如果您将此值传递给数据库，您应该进行一些验证：
if ($_GET['id']) { // check parameter was passed
$subject = int_val($_GET['id']) // cast whatever was passed to integer
} else {
// handle no subject case
}
回答by Mohammed Joraid
Yes you can, it will be considered as GET. as for how to pass it. Edit the following:
是的，您可以，它将被视为 GET。至于怎么通过。编辑以下内容：
<td><a href='approve.php?id=<?=$sub->id?> ' role="button" class="btn">Add Topic</a></td>
This is the part:
这是部分：
<?=$sub->id?>
You closed php tag when u started adding html therefore open it again to echo php vars.
当你开始添加 html 时，你关闭了 php 标签，因此再次打开它以回应 php vars。
