Autoryzacja użytkownika w PHP

przez fsockopen: 

$header .= 'GET ... HTTP/1.0'."\r";
$header .= 'Host: '.$domain."\r";
$header .= 'Authorization: Basic '. base64_encode('login:haslo')."\r";
$header .= "\r"; 

$fp = @fsockopen ($host, 80, $errno, $errstr, 10);

if (!$fp) {
 $ret_value = "$errstr ($errno)";
} else {
 ...
}

przez stream_context_create:

$ctx = stream_context_create(
 array(
   'http' => array(
   'timeout' => 12,
   'header' => 'Authorization: Basic '. base64_encode('login:haslo')
  )
 )
);
$xml_data = file_get_contents($url, 0, $ctx);