Hi James, I’m now using the field key but I still cannot add new fields to new users without adding a field in the back-end first.
How would I resolve this?
EDIT: A bit of code I wrote wasn’t making this function, the above solution works.
$field_key = 'field_570d00f097fbd';
//$user1 is user1's ID
//$user2 is user2's ID
echo 'adding field...<br>';
$post_id1 = 'user_' . $user2;
$value1 = get_field($field_key, $post_id1);
$value1[] = array("user" => $user1);
update_field($field_key,$value1,$post_id1);
$post_id2 = 'user_' . $user1;
$value2 = get_field($field_key, $post_id2);
$value2[] = array("user" => $user2);
update_field($field_key,$value2,$post_id2);
