Need Help With Iframe PHP

Hello how would i make an iframe like this

It must have some way of getting the url on the top so index.php?=http://domain.com

I need it so that the http://domain.com can be any url and that the page will go to it.

Somebody please help. and thank you!

 

Are you talking about something like

URL:
http://yoursite.com/index.php?url=http://google.com

Simplified PHP:
$content = "<frame src=\"{$_GET['url']}\"></frame>";

 

aahh i dont know what to do someone help me please

 

<?php
$url=isset($_GET["url"])?$_GET["url"]:false;
if($url){
?>
<div>your header</div>
<iframe src="<?=$url?>"></iframe>

<?php
}else{
?>
show something if url is not provided
<?php
}
?>

Code (markup):

I think you know html/css