Simple HTTP Redirect Function

// place within index.php
 
// figure out our settings and manipulate variables accordingly
$self	= 'index.php';
$uri	= str_replace($self, '', $_SERVER['SCRIPT_NAME']);
$https	= ( isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ) ? true : false;
if ( $https !== false ) $site = "https://{$_SERVER['HTTP_HOST']}{$uri}";
else $site = "http://{$_SERVER['HTTP_HOST']}{$uri}";
 
// define our constant
define('SITE', $site);
 
// free up our variables
unset($self,$uri,$https,$site);
 
/******************************************************************************/
/*  redirect($address)
/*
/*  Redirects your browser to $address
/******************************************************************************/
 
function redirect($address)
{
    // Make sure address is formatted properly
    if( stripos($address, 'http://')    === false  &&
        stripos($address, 'https://')   === false
    ) $address = SITE.$address;
 
    // redirect
    header("Location: {$address}");
}