What are the best practices for checking proxy server anonymity levels using PHP?

To check the anonymity levels of a proxy server using PHP, you can make a request to a website that returns your IP address and compare it with the IP address seen by the website when accessed through the proxy. This can help determine if the proxy server is transparent, anonymous, or elite. 

$proxy = 'proxy_ip:proxy_port';
$url = 'https://api.ipify.org?format=json';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);

if($response === false){
    echo 'Error: ' . curl_error($ch);
} else {
    $data = json_decode($response, true);
    echo 'Your IP address: ' . $data['ip'];
}

curl_close($ch);

Keywords

cURL proxy server anonymity levels HTTP headers PHP script

Related Questions