PHP将URL重定向到包含变量的页面 [英] PHP redirect to page with variable in URL

问题描述

我有一个页面， q.php ，这是一个用户提交的帖子，由它的id定义（例如， q.php？ id = 1 会是一个使用 $ id 变量从数据库中提取所有其他信息的特定帖子。）

我试图在同一页面上编写评论提交代码，并说明用户可能不会在该字段中输入任何内容。如果发生这种情况，我想让页面（例如 q.php？id = 1 ）再次载入错误信息。

我可以用一个空变量来做错误消息，然后通过表单激活的php文件给出一个值。但是，我在导航回特定帖子时遇到问题。我尝试使用 include（'q.php？id = $ id） $ id被设置为一个数字，但我明白这不是它的目的，不接受变量

我应该用什么来代替？

编辑
$ p $ require' q.php;
$ _GET ['id'] = $ id;
$ _SESSION ['error'] =请填写所有字段。;


q.php：

  if（$ _SESSION ['error']！== 0）{
 echo< p style ='color：＃AA1111;'>。$ _ SESSION ['error' ]。 < / A> 中; 
 unset（$ _ SESSION ['error']）; //这是没有发生的...... 
} 
  

解决方案

如果你真的必须包含页面内联，你总是可以修改 $ _ GET ：

  $ _ GET ['id'] = $ id; 
需要'q.php'; 
  

但是错误消息听起来像是可以通过会话变量或重定向完成的。重定向可能类似于：

  header（'Location：q.php？id ='。$ id。'&误差= +的错误'）; 
 exit（）; 
  

然后，检查 $ _ GET ['error'] 在 q.php 中。使用会话变量可能会非常相似，除了将 error 作为查询字符串参数添加外，您可以使用 $ _ SESSION ['error'] 和取消设置立即。

I have a page, q.php, that is a user submitted post defined by its id, (for example, q.php?id=1 would be a certain post that uses the $id variable to pull all the rest of the information from the database).

I am trying to code a comment submission on the same page, and account for the fact that a user might not enter anything into the field. If this happens, I want the page (e.g. q.php?id=1) to load again with an error message.

I can do the error message with an empty variable that is then given a value by the php file that the form activates. However, I am having a problem navigating back to the specific post. I tried to use include('q.php?id=$id) where $id is set to a number, but I understand that this is not its purpose and it does not accept variables

What should I be using instead?

EDIT

answer.php (file that the form activates):

require 'q.php';
$_GET['id'] = $id;
$_SESSION['error'] = "Please fill in all of the fields.";

q.php:

if ($_SESSION['error'] !== 0) {
    echo "<p style='color: #AA1111;'>".$_SESSION['error']."</a>";
    unset($_SESSION['error']); // this isn't happening...
}

解决方案

If you really must include the page inline, you can always modify $_GET:

$_GET['id'] = $id;
require 'q.php';

But an error message sounds like it could be accomplished with a session variable or a redirect. A redirect could look something like:

header('Location: q.php?id=' . $id . '&error=The+error');
exit();

Then, you check for $_GET['error'] in q.php. Using a session variable for that would be much the same, except instead of adding error as a querystring parameter, you use $_SESSION['error'] and unset it immediately.

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