CURL: Autentificación básica

function ws_login($usuario, $password){
$url = 'https://apidotest.midominio.com/users/login';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization : Basic ".base64_encode($usuario.":".$password)));
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_POST, false);
$output = curl_exec($ch);
curl_close($ch);

return $output;
}

$arrLogin = ws_login("uno", "dos");
print_r($arrLogin);