Warning: include(Smarty/Smarty.class.php): failed to open stream: No such file or directory in /var/www/html/login.php on line 2

Warning: include(): Failed opening 'Smarty/Smarty.class.php' for inclusion (include_path='/usr/share/php5') in /var/www/html/login.php on line 2

Fatal error: Class 'Smarty' not found in /var/www/html/login.php on line 4