15-proxy-chaining.php

<?php

// A more advanced example which requests http://www.google.com/ through a chain of SOCKS proxy servers.
// The proxy servers can be given as arguments.
//
// Not already running a SOCKS proxy server? See also example #21 or try this:
// $ ssh -D 1080 localhost
//
// For illustration purposes only. If you want to send HTTP requests in a real
// world project, take a look at example #01, example #02 and https://github.com/reactphp/http#client-usage.

require __DIR__ . '/../vendor/autoload.php';

if (!isset($argv[1])) {
    echo 'No arguments given! Run with <proxy1> [<proxyN>...]' . PHP_EOL;
    echo 'You can add 1..n proxies in the path' . PHP_EOL;
    exit(1);
}

$path = array_slice($argv, 1);

// Alternatively, you can also hard-code this value like this:
//$path = array('127.0.0.1:9051', '127.0.0.1:9052', '127.0.0.1:9053');

// set next SOCKS server chain via p1 -> p2 -> p3 -> destination
$connector = new React\Socket\Connector();
foreach ($path as $proxy) {
    $connector = new Clue\React\Socks\Client($proxy, $connector);
}

// please note how the client uses p3 (not p1!), which in turn then uses the complete chain
// this creates a TCP/IP connection to p1, which then connects to p2, then to p3, which then connects to the target
$connector = new React\Socket\Connector(array(
    'tcp' => $connector,
    'timeout' => 3.0,
    'dns' => false
));

echo 'Demo SOCKS client connecting to SOCKS proxy server chain ' . implode(' -> ', $path) . PHP_EOL;

$connector->connect('tls://www.google.com:443')->then(function (React\Socket\ConnectionInterface $connection) {
    echo 'connected' . PHP_EOL;
    $connection->write("GET / HTTP/1.0\r\n\r\n");
    $connection->on('data', function ($data) {
        echo $data;
    });
}, function (Exception $e) {
    echo 'Error: ' . $e->getMessage() . PHP_EOL;
});