I am working with a Billing system called Freshbooks/BillingArm. They have an API that allows me to create invoices and new clients via a form. They have 2 sample PHP API codes and I a need help with them. Attached is a sample one for creating an Invoice. I have tried to get this work, but nothing is appearing in my window. Can you please look at this code? The beginning has an IF statement that makes me think a HTML FORM (which appears at the bottom of the code) to appear, and then it will process the PHP code above once the SUBMIT is pressed. Please look this over and let me know.