How can PHP developers handle IP address tracking and blocking effectively in their scripts?

To handle IP address tracking and blocking effectively in PHP scripts, developers can utilize the $_SERVER['REMOTE_ADDR'] variable to retrieve the IP address of the client. They can then compare this IP address against a list of blocked IPs and take appropriate actions based on the result. 

$blocked_ips = array("127.0.0.1", "192.168.0.1");

$client_ip = $_SERVER['REMOTE_ADDR'];

if (in_array($client_ip, $blocked_ips)) {
    // IP address is in the blocked list, take action (e.g., display an error message or redirect)
    echo "Access denied. Your IP address has been blocked.";
    exit;
} else {
    // IP address is not blocked, continue with the script
    echo "Welcome!";
}

Keywords

IP address tracking blocking PHP scripts security blacklist

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