Hello brothers, i want to try to make an ip verification, but i dont know how to send an command like sudo from php, i want to get the ip of the website visitor and send an iptables/ufw or other command allowing his ip, any suggestions/ideas/help? im very newbie in php and ubuntu  :(

https://stackoverflow.com/questions/3003145/how-to-get-the-client-ip-address-in-php