Fatal error: Uncaught Error: Undefined class constant 'SERVER' in /home/herut/public_html/model/db.class.php:39 Stack trace: #0 /home/herut/public_html/model/about_videos.class.php(98): db::getInstance() #1 /home/herut/public_html/model/about_videos.class.php(14): about_videos->get_videos_list() #2 /home/herut/public_html/controller/aboutController.php(43): about_videos->__construct() #3 /home/herut/public_html/application/router.class.php(87): aboutController->videos() #4 /home/herut/public_html/index.php(29): router->loader() #5 {main} thrown in /home/herut/public_html/model/db.class.php on line 39