PMA\libraries\Util::handleContext PHP Method

    public static function handleContext(array $context)
    {
        if (strlen($GLOBALS['cfg']['ProxyUrl']) > 0) {
            $context['http'] = array('proxy' => $GLOBALS['cfg']['ProxyUrl'], 'request_fulluri' => true);
            if (strlen($GLOBALS['cfg']['ProxyUser']) > 0) {
                $auth = base64_encode($GLOBALS['cfg']['ProxyUser'] . ':' . $GLOBALS['cfg']['ProxyPass']);
                $context['http']['header'] .= 'Proxy-Authorization: Basic ' . $auth . "\r\n";
            }
        }
        return $context;
    }

 /**
  * Returns information with latest version from phpmyadmin.net
  *
  * @return object JSON decoded object with the data
  */
 public function getLatestVersion()
 {
     if (!$GLOBALS['cfg']['VersionCheck']) {
         return null;
     }
     // wait 3s at most for server response, it's enough to get information
     // from a working server
     $connection_timeout = 3;
     $response = '{}';
     // Get response text from phpmyadmin.net or from the session
     // Update cache every 6 hours
     if (isset($_SESSION['cache']['version_check']) && time() < $_SESSION['cache']['version_check']['timestamp'] + 3600 * 6) {
         $save = false;
         $response = $_SESSION['cache']['version_check']['response'];
     } else {
         $save = true;
         $file = 'https://www.phpmyadmin.net/home_page/version.json';
         if (ini_get('allow_url_fopen')) {
             $context = array('http' => array('request_fulluri' => true, 'timeout' => $connection_timeout));
             $context = Util::handleContext($context);
             if (!defined('TESTSUITE')) {
                 session_write_close();
             }
             $response = file_get_contents($file, false, stream_context_create($context));
         } else {
             if (function_exists('curl_init')) {
                 $curl_handle = curl_init($file);
                 if ($curl_handle === false) {
                     return null;
                 }
                 $curl_handle = Util::configureCurl($curl_handle);
                 curl_setopt($curl_handle, CURLOPT_HEADER, false);
                 curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, true);
                 curl_setopt($curl_handle, CURLOPT_TIMEOUT, $connection_timeout);
                 if (!defined('TESTSUITE')) {
                     session_write_close();
                 }
                 $response = curl_exec($curl_handle);
             }
         }
     }
     /* Parse response */
     $data = json_decode($response);
     /* Basic sanity checking */
     if (!is_object($data) || empty($data->version) || empty($data->releases) || empty($data->date)) {
         return null;
     }
     if ($save) {
         if (!isset($_SESSION) && !defined('TESTSUITE')) {
             ini_set('session.use_only_cookies', 'false');
             ini_set('session.use_cookies', 'false');
             ini_set('session.use_trans_sid', 'false');
             ini_set('session.cache_limiter', 'nocache');
             session_start();
         }
         $_SESSION['cache']['version_check'] = array('response' => $response, 'timestamp' => time());
     }
     return $data;
 }