createButton() error

[ghost]

I copy pasted the code on the Readme (php version) and everything seems to be working quite well. However I get the following error when I try to create a payment button using $coinbase->createButton()

Fatal error: Uncaught exception 'Coinbase_ApiException' with message 'Invalid response body' in ....

[isaacwaller]

Could you try something like this:

try {
  $response = $coinbase->createButton("Your Order #1234", "42.95", "EUR", "my custom tracking code for this order", array(
            "description" => "1 widget at €42.95"
        ));
} catch (Coinbase_ApiException $e) {
  var_dump($e);
}

And paste the output here?

[ghost]

Thanks for taking a look. Today I found out that I get an error only if I use the symbol € in the description. Everything works perfectly if that symbol is removed