Let me start by saying that GF and ACF are 2 very different plugins and can’t work together in the ways that you want them to. This is due to the different ways that both plugins save data for the same field types.
1) Yes, you can use a PHP function called
is_numeric to find out if the vale from
get_field is a number (ACF), or not (GF).
2) Yes, because GF saves a url instead of a link, ACF can’t read any information about the attachment. There is no solution for this
3) No, the repeater field is an ACF exclusive and won’t work in any other plugin.
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We've just released ACF 5.12.3 with a security fix to prevent arbitrary file uploads to forms with ACF fields.— Advanced Custom Fields (@wp_acf) July 14, 2022
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