How reliable is it to block visitors based on their IP address in PHP, considering that non-static IP addresses may not always accurately reflect a user's location?

Blocking visitors based on their IP address in PHP may not always be reliable, especially for non-static IP addresses which may change frequently and not accurately reflect a user's location. To improve accuracy, it's recommended to use additional methods such as geolocation services or user authentication. This will help ensure that legitimate users are not mistakenly blocked. 

// Example of using geolocation service to block visitors based on their location
$ip = $_SERVER['REMOTE_ADDR'];
$details = json_decode(file_get_contents("http://ipinfo.io/{$ip}/json"));

if($details->country == "US") {
    // Block visitors from the US
    header("Location: blocked.php");
    exit();
}

Keywords

IP address geolocation reliability non-static PHP

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