Fatal error: Uncaught Error: Undefined constant "SITE_URL" in /Applications/MAMP/htdocs/recipe-website/includes/upload.php:7 Stack trace: #0 /Applications/MAMP/htdocs/recipe-website/index.php(3): require_once() #1 {main} thrown in /Applications/MAMP/htdocs/recipe-website/includes/upload.php on line 7