This example defaults to sandbox mode (i.e. $config->setDemo(true) in the integration.php. Enter a test card no. and then move the cursor off the card input field
To test card enrolled use card no: 4111111111111112
To test card not enrolled use card no: 4111111111111111
You can also use this example to validate your api key and secret by switching $config->setDemo(false) in the integration.php and setting your supplied api key and secret
You use the browser's console to see debug statements when information in entered into the form (you should turn this off before going live by removing the verbose option in the JS SDK initialization