bonvisao

You can't print anything before sending a header because in an HTTP request headers must always get sent before the content.

 

If you send a location header, the user's not going to see what you printed anyways because the browser would immediately jump to the next page.

 

To get around this you can make Javascript perform the redirect instead of sending a header.

Yes .

You can search for URL rewriting. How it's done depends on what software is running on your server and how it's configured.

 

Many servers use Apache in which you can use mod_rewrite directives in a .htaccess file in order to change the URL.

 

It's not easy, you have to be willing to learn something new.

 

Yes !