I didn’t quite understand what this means:
Now you can pass in either { * | true | all } and retrieve all of your custom fields.
Any of these will work
?json=true&custom_fields=*
?json=true&custom_fields=true
?json=true&custom_fields=all
I didn’t know where to put this in the original code. So I used your serialized arrays code but I’m not using serialized arrays in my custom fields.