$smarty->setLeftDelimiter('<{'); //左定界符
$smarty->setRightDelimiter('}>'); //右定界符
$smarty->setTemplateDir('tpl'); //模板地址
$smarty->setCompileDir('comp'); //编译文件
$smarty->setCacheDir('cache'); //缓存地址
$smarty->setCaching(Smarty::CACHING_LIFETIME_CURRENT);
$smarty->setCacheLifetime(300);
smarty-3.1.30
