What is the significance of using $_SERVER['REMOTE_ADDR'] in PHP?

Using $_SERVER['REMOTE_ADDR'] in PHP allows you to retrieve the IP address of the client making the request to the server. This can be useful for tracking or logging purposes, identifying the location of the user, or implementing security measures based on the client's IP address. 

// Get the IP address of the client
$client_ip = $_SERVER['REMOTE_ADDR'];

// Output the IP address
echo "Client IP Address: " . $client_ip;

Keywords

$_SERVER REMOTE_ADDR PHP server variable client IP address

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