what's the difference between those links - CSS-Tricks

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May 29, 2011 at 11:35 pm #32913
The-Marshal
Member
Hi all

what i know is
```
mydomain/index.php?id=1 ....
```
but this really i first time see it
```
http://mydomain/index.php?img=http://mydomain/images/1.png
```
also this
```
http://mydomain/?7
```
could you explane the difference ?
May 30, 2011 at 6:33 am #74985
jamygolden
Member
You can store variables within the URL. for example:
```
http://mydomain.com/?name=Jamy&favfood=Pankcakes
```
That would load mydomain.com with the variables of name = Jamy and favfood = Pancakes.

You could fill out a form, click submit and the next page could be loaded with info you typed stored in the URL. It could then greet you. “Hi Jamy”, etc.

This is done via PHP’s $_GET. Have a look at this: http://php.net/manual/en/reserved.variables.get.php
May 30, 2011 at 12:39 pm #74951
ddliu
Member
```
http://mydomain/index.php?img=http://mydomain/images/1.png
```
it’s no difference with
```
mydomain/index.php?id=1
```
they are all key-value pairs, you can retrieve the first one with $_GET or $_REQUEST on server side; you can retrieve the second one with $_GET or $_REQUEST on server side.

For the last one:
```
http://mydomain/?7
```
It’s useful for a user friendly url(which may be replaced by url rewrite for a more friendly url), you can get the request data with $_SERVER on server side – that is $_SERVER=7 in your given url.
May 30, 2011 at 10:26 pm #74941

The-Marshal
Member

I understand now thank you very much jamy and ddliu ..
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