Notice: Undefined index: screenwidth in /var/www/htmlx/app/views/shedule/index.phtml on line 4

Fatal error: Uncaught Error: Using $this when not in object context in /var/www/htmlx/app/views/shedule/index.phtml:10 Stack trace: #0 {main} thrown in /var/www/htmlx/app/views/shedule/index.phtml on line 10