Fatal error: Uncaught Error: Using $this when not in object context in C:\xampp\htdocs\unicorn_ecomm\uploads\static\landingpage\iPhone11TradeinRD.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\unicorn_ecomm\uploads\static\landingpage\iPhone11TradeinRD.php on line 7