external extension to Formidable PRO Wordpresss plugin - #2

I have an external extension to Formidable PRO Wordpresss plugin (works like described in https://www.freelancer.com/projects/PHP-Wordpress/external-extension-Formidable-PRO.html ). The current task is to create (within the ready post-creation add-on plugin) a grid for typing in FORMULAS for auto-generating: (1) post SEO meta-tags, (2)custom fields (3)taxonomies. These 3 types of data should get generated based on (1)form fields, (2)standard WP variables, (3)plain text admin input. Admin must be able to type both form fields AND basic Wordpress variables AND regular text, including combinations of all three of these data types. Like this: =Treatment of disease %form_field_y% - filed by %user_ID% at %date% %time% =%form_field_y%, %form_field_y%s, %synonym_form_field_y% etc etc etc.... Admin text input should be variable. I mean - I'd like to be able to enter several text versions, and the script will randomly select one of them when creating a post. It should look something like this: =[Treatment of disease |Treatment of illness |Medical solution ]%form_field_y%[ - filed by | - submitted by ]$$user_ID$$[ at ]$$date$$[ ]$$time$$ (I've put text admin input between "[]", form field names between "%%", and Wordpress variables in "$$"). --------------------------------- THIS TASK IS URGENT! Must be completed within the next 48 hours.