PHP: Determine or Retrieve Visitor's IP Address Using PHP Script

To determine or retrieve the visitor's IP address using a PHP script, you can use the $_SERVER['REMOTE_ADDR'] variable.

Here is an example of how to retrieve and display the visitor's IP address in a PHP script:

<?php
$ip_address = $_SERVER['REMOTE_ADDR'];
echo "Your IP address is: $ip_address";
?>

This will output the visitor's IP address to the browser.

Note that the $_SERVER['REMOTE_ADDR'] variable may not always accurately reflect the visitor's true IP address, especially if the visitor is behind a proxy or VPN. In these cases, the $_SERVER['REMOTE_ADDR'] variable may contain the IP address of the proxy or VPN server, rather than the visitor's actual IP address.

To get the visitor's true IP address in these cases, you may need to use additional techniques, such as checking the $_SERVER['HTTP_X_FORWARDED_FOR'] variable or using a third-party service to look up the IP address.