Some additional information:
The match_mentor & match_mentee and current_mentees are all ACF fields.
I am able to manually add (mentee) users (single & multiple) to the current_mentees through the dropdown in the user account. It appears as an array of arrays.
The first one looks like: a:1:{i:0;s:2:”60″;}
Adding the second one gives me: a:2:{i:0;s:2:”60″;i:1;s:2:”57″;}
This is functional for my purpose. I’d like the code to do the same.
Using the above code to add one user, in the current_mentees field/DB I see 60.
And then adding the 2nd one, I get a:1:{i:0;i:57;}. (It replaces the first one).
