youtube video sql to rce: https://youtu.be/YLqpfUXiSRo links: https://stackoverflow.com/questions/54307842/php-file-executed-even-without-executable-permissions#:~:text=PHP%20file%20is%20not%20an,php%20files. https://askubuntu.com/questions/9402/what-file-permissions-should-i-set-on-web-root