... PHP 3 <= 3.0.18, PHP 4 >= 4.0.0) header -- Send a raw HTTP header . ... header() is used to send raw HTTP headers. ... Not only does it send this header back to the browser, but it also returns a REDIRECT (302) status code to the browser. header("Location: http://www.php.net/"); /* Redirect browser to PHP web site */ exit; /* Make sure that code below does not get executed when we redirect. ... Note: You may find that your pages aren't cached even if you don't output all of the headers above. ...