Does anyone have php code examples for the AddressVerify API on Paypal?

I'm wanting to use the AddressVerify API to check if a user who's signing up to my website has an email address which is associated with a paypal account.

I've found: https://cms.paypal.com/cms_content/US/en_US/files/developer/PP_NVPAPI_DeveloperGuide.pdf

which is obviously very useful and also I've downloaded the php_nvp_samples.zip file which has all the code samples. But it doesn't seem to include the code to make an AddressVerify call.

I know I should probably be ab开发者_JAVA百科le to piece together something that would do the trick from the samples but I'm new and stupid and need help. Don't suppose anyone has some code to make an AddressVerify call which they don't mind sharing with me?

Thanks in advance