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Remove used options on specific dropdowns

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I found a hook that can remove used options from a dropdown.  How do I modify to remove only from specific forms?https://formidableforms.com/knowledgebase/frm_setup_new_fields_vars/#kb-remove-used-options

Each dropdown on a form has a unique field ID. Field ID only applies to a single form. It should be sufficient.

Thanks for the reply.  I get it now.  What happens if I have two different dropdowns that I want to do this to?  Do I need to create a hook for each dropdown?

No. Look at this line in the code:

in_array( $field->id, array(100,101,102) )

Each of those numbers is the field id for a different drop down. List your drop down field ids there.

That makes sense.  Thanks so much for all the help.

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