[SOLVED] How does vars in address bars work?

[Fabis94]

In forums (for example this one) the address says /index.php?action=post;board=1.0.

How does it work? It doesn't create new pages (posts, topics, forums etc.), but just makes stuff in the same old one (index.php). I've seen it on other websites too. Like the page is comments.php?x=1 and its the page one of something, then you click Go To Page 2 and nothing in the address bar changes just the x=1 becomes x=2, but the whole page is different.

[peuge]

These addresses are sending variables via the GET method. Therefore if in index.php you do something along the lines of:

ADDRESS: www.site.com/index.php?x=1&y=2
$x = $_GET['x'];
$y = $_GET['y'];
echo $x;
echo $y;

It will output 12

You can use it alot in <a href="index.php?variable=<?php echo $variable?>">

 

Hope this helps

[redarrow]

dont forget is set it a security fix or it helps.

$x = isset($_GET['x']);