RFI
Remote File Inclusion bypassing .htaccess
If by any chance you are able to upload a file remotely within a server but you can’t see the content due to a php restriction: 
Try by using another extension other than .php for example .phar or .phtml this will let you upload the file and it will be interpreted: 
Remember to check where is the file uploaded, won’t be always be within the assets folder.
Examples: ECHO CTF PCPrincipal Machine