What is the significance of using $_SERVER['REMOTE_ADDR'] in PHP for retrieving IP addresses?

When retrieving IP addresses in PHP, using $_SERVER['REMOTE_ADDR'] is significant because it provides the IP address of the client making the request to the server. This is useful for various purposes such as tracking user activity, implementing security measures, and personalizing content based on location. 

// Retrieve the IP address of the client
$ipAddress = $_SERVER['REMOTE_ADDR'];

// Output the IP address
echo "Client's IP Address: " . $ipAddress;

Keywords

$_SERVER REMOTE_ADDR IP addresses PHP significance

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