如何为没有HTML表单和URL的$ _GET创建查询字符串？ [英] how to create query string for $_GET without HTML form and URL?

问题描述

影像我们在主页：www.example.com

Imaging we are at home page: www.example.com

我们在此页面有一个超链接。

we have a hyperlink on this page.

<a href="category/Pizzas">Pizzas</a>

点击此超链接时，地址栏中的网址为：

when click this hyperlink, the url at address bar will be:

www.example.com/category/Pizzas

它会向我们展示不同种类的披萨。问题是我的服务器中没有类别/比萨饼这样的路径。它的工作方式是将category和Pizzas传递给两个查询字符串（page和cat），它们将存储在$ _GET中。所以真正的网址是：

and it will show us the different kinds of pizzas. The problem is I don't have a path like category/Pizzas in my server. The way it works is to pass category and Pizzas to two query strings (page and cat), which will be stored in $_GET. So the real url is :

www.example.com/?page=category&cat=Pizzas

然后有一个函数可以呈现比萨饼页面。

Then there is a function to render the Pizzas page.

你可以图像我们有一些其他的主页上的超链接，他们有不同的网址。例如：

You can image we have some other hyperlinks on the main page and they have different urls. For example:

<a href="category/Salads">Salads</a>
<a href="category/Wraps">Wraps</a>
<a href="category/Grinders">Grinders</a>

当您点击它时，查询字符串（页面和猫）将从url中捕获该值并进行相应的渲染。

when you click it, query strings(page and cat) will capture the value from url and render accordingly.

我不明白的部分是如何以及在哪里定义查询字符串（在这种情况下是：page和cat），并从URL类别/ Pizzas所以我们可以有page = category& cat = Pizzas。源代码中没有这两个查询字符串的HTML表单。它完美地工作。

The part I don't understand is how and where to define the query string (in this case: page and cat) and capture value from URL like category/Pizzas so we can have page=category&cat=Pizzas. There is no HTML form for these two query strings in source code. It just works perfectly.

ps。如果你有兴趣，这里是我正在谈论的项目。这不是我的项目。
https://github.com/nelsonreitz/project0

ps. if you are interested, here is the project I'm talking about. This is not my project. https://github.com/nelsonreitz/project0

推荐答案

在这个回购中，看看public / .htaccess
这就是魔术发生的地方。它实际上是将网址映射到参数的网络服务器。代码如下所示：

In that repo, take a look in public/.htaccess This is where the magic happens. It's the web server which actually does the job of mapping the url to parameters. The code looks like this:

RewriteEngine on
RewriteBase /
RewriteRule ^category/(.*)$ index.php?page=category&cat=$1 [L]

url类似于/将被重写为index.php？page = category& cat =

What that's doing is saying any url that looks like category/ will be rewritten to index.php?page=category&cat=

因此，index.php实际上处理所有这些请求，并且具有正确的GET值 - 即使使用的网址不同。

So index.php actually handles all those requests, and has the correct GET value - even though the url used is different.

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