Hi @elbowpham
I would fist look at the varible $data and find out what you can play with. This is more commonly known as variable ‘debugging’. You can do this like so:
<?php
echo '<pre>';
print_r($data);
echo '</pre>';
die;
?>
Using this code will display the contents of $data.
You should see that the custom field value is something like:
$data['fields']['field_1235678']
The field_1235678 is the field_key which you can find from the field edit screen, or simply just figure it out from the posted $data
Cheers
E
