I am using ampscript in Cloud Pages. I am creating a form that will have a different number of options based on DE data. I need to change DE data based on the information that comes out of the form. I intend to put the data into the post array, but I don't know how to pull it out. I know how to put information into the post array with CloudPagesURL(), and I can get information out of the post array when I know what to ask for with requestparameter().
Is there a way to find the length of the array, or find the keys in the array?