Can we add our $_POST data to an infusionsoft form ready for submission?

We have created an Infusionsoft form and want to inject the $_POST data from our custom form. But looking at the HTML on the Infusionsoft form there doesn’t appear to be a ‘value’ on the inputs. We we expecting to see something like:

Is it possible to add our $_POST data to an Infusionsoft form ready for submission? If so, how do we go about doing that?

Thank you in advance for any thoughts/help.

@Jay_Emery
It sounds like you are wanting to use your own form that will submit to your server then the server will post to an Infusionsoft form. The issue with doing this is that it is the same method used by spam bots. As we improve our spam bot detection your script might not work. We suggest utilizing the API to add contact information into Infusionsoft as documented if the following places:
https://developer.infusionsoft.com/docs/rest/#!/Contact/createContactUsingPOST
https://developer.infusionsoft.com/docs/rest/#!/Contact/createOrUpdateContactUsingPUT
https://developer.infusionsoft.com/docs/rest/#!/Contact/updateContactUsingPATCH
https://developer.infusionsoft.com/docs/xml-rpc/#contact-create-a-contact
https://developer.infusionsoft.com/docs/xml-rpc/#contact-create-a-contact-and-check-for-duplicates

There is another thread about this which can be found here: Use curl to submit infusion legacy form