Q:

Adding a header to any webpage I want

I researched the internet and haven't found anything about this so I come requesting your help  Stack Overflow community.
What I want to learn/find out is how to use a form input where I post a link to any website and after clicking the submit button, it takes me to that website with a header coded by me on it on my domain (similar to StumbleUpon).
I got the HTML/PHP part down so all that remains is the "2nd" page with the website from the input and my header in it. I don't want anything fancy for the header so I'm just gonna do a plain HTML text and style it with a bit of CSS. What I don't know is how to put the rest of the website under it.

A:

I had a hunch but before just answering your question, I did some research. It seems that stumbleupon uses iframes to load the page under the toolbar. Here is a link to StumbleUpon staff answering a question about that. 
http://www.quora.com/Does-StumbleUpon-use-iframes-to-load-other-pages-If-so-how-do-they-get-around-scripts-that-bust-out-of-frames

