gistfile1.txt

/**
 * Handling behind reverse proxy
 */ 
if ( isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
	$http_x_headers = explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] );
	$_SERVER['REMOTE_ADDR'] = $http_x_headers[0];
}

if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
    $_SERVER['HTTPS']='on';

if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
    $_SERVER['HTTP_HOST'] = $_SERVER['HTTP_X_FORWARDED_HOST'];
}