Welcome to the Q&A Forum

Hello there! This is more of a customer service question than an SEO question, so definitely hit up our support forums at http://seomoz.zendesk.com. Specifically, the API Developer's Forum is where you should post questions about the API: http://seomoz.zendesk.com/forums/293196-developer-discussion-group. If it's account-specific, you can always write in a support question to help@seomoz.org. I'm not familiar with PHP, but if you try to make the call using the http sample code provided at www.seomoz.org/api you should be able to get data back. If you need help with other sample code, hit up those API forums and check our the API Wiki: http://apiwiki.seomoz.org/w/page/13991133/SEOmoz-API-Home. Hope that helps! See you on the forums.