Predefined
Predefined variables contain information about the server's operating environment.
They can be accessed by typing $_SERVER
followed by the variable name:
$server_addr = $_SERVER['SERVER_ADDR'];
$server_name = $_SERVER['SERVER_NAME'];
$remote_addr = $_SERVER['REMOTE_ADDR'];
echo "The server's host name is $server_name";
echo "The server's IP address is $server_addr";
echo "Your IP address is $remote_addr";
Output:
The server's host name is bhmolina.soisweb.uwm.eduThe server's IP address is 129.89.43.13
Your IP address is 3.135.209.149