What is the role of $_SERVER['REMOTE_ADDR'] in determining the source of a user's connection in PHP?

$_SERVER['REMOTE_ADDR'] is a PHP superglobal variable that contains the IP address of the user making the request to the server. It can be used to determine the source of a user's connection, which is helpful for tracking user activity or implementing security measures. By using $_SERVER['REMOTE_ADDR'], you can retrieve the IP address of the user and use it in your PHP code as needed. 

// Get the IP address of the user
$user_ip = $_SERVER['REMOTE_ADDR'];

// Use the user's IP address in your PHP code
echo "User's IP address: " . $user_ip;

Keywords

$_SERVER REMOTE_ADDR user connection PHP source

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