Something

if ( !isset( $_COOKIE['itn_session'] ) ) {

	header( "Location: /signin.php" );
	exit;

}
setcookie('itn_session', 'destroy session', time() - 3600, '/', '192.168.1.3', FALSE, TRUE);
@require( ITN_INC_DIR . 'template.php' );
$tpl    = new template();
$tpl_vars = array
(
	'{PAGE_TITLE}' => ': Thank You!','{META_REFRESH}' => "<meta http-equiv='refresh' content='5;url=/signin.php'>",
	'{HOME_TAB}'   => '','{ARTICLES_TAB}' => '','{FEEDS_TAB}' => '','{MEMBERS_TAB}' => '','{SEARCH_TAB}' => ''
);
$output = $tpl->compile_tpl( $tpl->load_tpl( 'header.tpl' ), $tpl_vars ) . "\n" . $tpl->load_tpl( 'body_signed_off.tpl' );
echo $output . "\n" . $tpl->load_tpl( 'footer.tpl' );
exit;