Fake Proxy Login

gistfile1.php

<?php

set_error_handler(function($errno, $errstr, $errfile, $errline, array $errcontext) {
    // error was suppressed with the @-operator
    if (0 === error_reporting()) {
        return false;
    }

    throw new ErrorException($errstr, 0, $errno, $errfile, $errline);

});

$username = $_POST['username'];
$password = $_POST['password'];

$context = stream_context_create(array(

    'http' => array(

        'header'  => "Authorization: Basic " . base64_encode("$username:$password")

    )

));

try {
$url = 'http://www.msn.com.tw/';
$data = file_get_contents($url, false, $context);
} catch(Exception $e) {
   $pos = strpos($e->getMessage(), '401 Unauthorized');
   if($pos !== false) {
        echo "failed";
   } else {
        echo "success";
  }
}