I'm stuck and I can't seem to find an answer anywhere. I'm trying to change $form['confirmation']['pageId'] depending on the value of the {embed_url} merge tag which I have stored in a hidden field.
The problem is that the value of the hidden field is literally {embed_url}. How do I see the actual page the form was submitted from?
How about using the gform_confirmation filter? It has access to both the form and the lead, and the $lead['source_url'] will be the embed URL. Then your function to set the confirmation redirect dynamically can be hooked to that filter and read that value and redirect appropriately.
I don't think the {embed_url} is set when gform_pre_submission runs. I know it's available in the drop down of merge tags, but I don't think that is set until after submission, which is why you are seeing the literal value {embed_url} there.
