How can I detect if the user is on localhost in PHP?

Question

In other words, how can I tell if the person using my web application is on the server it resides on? If I remember correctly, PHPMyAdmin does something like this for security reasons.

Answer 1

You can also use $_SERVER['REMOTE_ADDR'] for which IP address of the client requesting is given by the web server.

$whitelist = array(     '127.0.0.1',     '::1' );  if(!in_array($_SERVER['REMOTE_ADDR'], $whitelist)){     // not valid }