http://{$smarty.server.SERVER_NAME}/{$smarty.server.REQUEST_URI}
Notes:
{$smarty.server.SERVER_NAME}// means: server name
{$smarty.server.REQUEST_URI}// means: requested url
For example: http://www.jb51.net/sysaction/getUserInfo.php
{$smarty.server.SERVER_NAME} //表示:http://www.jb51.net
{$smarty.server.REQUEST_URI}// 表示:/sysaction/getUserInfo.php